| Course | BUSI 3016 Finance Essentials Workplace Certificate |
|---|---|
| Week | Week 7 |
| Paper type | Cost behavior analysis |
| Length | About 880 words, 6 pages |
| Format | APA 7 student paper |
| School | Walden University |
| Program | BS in Business Administration |
| Updated | October 2026 |
Free sample paper for BUSI 3016 Week 7
Every Repair Call Costs About $160, but Only $71 of It Moves With the Call: A Cost Analysis of a Family Heating and Air Repair Department, With Contribution Margin, a Break-Even of 219 Calls a Month and What the Split Means for a $99 Spring Offer
Student Name
Walden University
BUSI 3016: Finance Essentials Workplace Certificate
Instructor Name
Month Day, Year
Every Repair Call Costs About $160, but Only $71 of It Moves With the Call: A Cost Analysis of a Family Heating and Air Repair Department, With Contribution Margin, a Break-Even of 219 Calls a Month and What the Split Means for a $99 Spring Offer
The Owner's Figure
Ozark Comfort's owner says every repair call costs the company about $160. She arrived at the figure by dividing the repair department's monthly costs by its average number of calls, and as an average it is right. In 2027 the department averaged 427 calls a month, and its costs averaged about $68,300 a month, which works out to about $160 a call.
The trouble is that the figure treats every dollar of cost as if it moved with the number of calls. Most of it does not. This analysis splits the $160 into costs that change with each call and costs the month brings regardless, then uses the split to compute contribution margin and break-even.
Splitting the Costs by Behavior
Table 1
Repair Department Costs per Month, 2027 Averages
| Cost | Behavior | Amount | |
|---|---|---|
| Technician time on the call, 1.5 hours at $32 | Variable, per call | $48 per call | |
| Fuel and van wear for the trip | Variable, per call | $14 per call | |
| Small materials such as fuses, wire and sealant | Variable, per call | $9 per call | |
| Technicians' guaranteed base pay beyond call time | Fixed, per month | $14,500 | |
| Van leases and insurance | Fixed, per month | $9,800 | |
| Dispatcher and service manager share | Fixed, per month | $9,500 | |
| Software, phones and tools | Fixed, per month | $4,200 | |
| Total fixed cost | Per month | $38,000 | |
Ozark Comfort Heating & Air and its costs are composite. Parts installed on a repair are billed to the customer separately and excluded here.
Variable Cost and Fixed Cost per Call
Variable cost per call = $48 + $14 + $9 = $71.
Fixed cost per month = $38,000.
At the 2027 average of 427 calls a month, fixed cost per call = $38,000 ÷ 427 = about $89.
Total = $71 + $89 = about $160, the owner's figure.
The split shows that only $71 of the $160 changes with each additional call. The other $89 is a share of costs the company pays whether it runs 200 calls in a month or 600. In a slow month the fixed share per call rises; in a busy month it falls. So $160 is not the cost of a call. It is the cost of an average call in an average month.
Contribution Margin
The average repair call brings in $245 of labor and diagnostic revenue, excluding parts.
Contribution margin per call = $245 − $71 = $174.
Contribution margin ratio = $174 ÷ $245 = 71 percent.
Each call contributes $174 toward the department's fixed costs and, once those are covered, toward profit. Garrison et al. (2021) present contribution margin as the key to how profit responds to changes in volume, because fixed costs do not change with each unit sold.
Break-Even
Break-even calls per month = fixed costs ÷ contribution margin per call = $38,000 ÷ $174 = 218.4, or 219 calls.
Below 219 calls a month, the repair department loses money; above it, each call adds $174 to profit. The department's year shows why that matters. In July it ran about 620 calls and contributed roughly $70,000 above its fixed costs. In April and October it ran about 240 calls, only about 20 above break-even, and contributed less than $4,000.
What the Split Changes
The owner has resisted a spring tune-up offer at $99 because, she says, "it costs us $160 to roll a truck." The split says otherwise. In April, when technicians have spare time and fixed costs are already being paid, a $99 call that uses the same 1.5 hours, fuel and materials costs only $71 more than not making it. Each $99 call contributes $28. If the offer brings in 150 extra calls in April, it adds about $4,200, roughly doubling the department's April contribution, and some of those customers will need repairs or replacements that carry full prices.
The offer would be a mistake in July. Then technicians are fully booked, and a $99 tune-up would take the place of a $245 repair, giving up $146 of contribution. The cost split does not just correct a number; it shows the offer makes sense only in months with spare capacity. Datar and Rajan (2021) caution that cost figures averaged over all units can mislead decisions about individual units, and that relevant costs depend on the decision at hand.
The same reasoning applies to other offers. A furnace safety check promoted in early October, before the heating rush, would use spare capacity the same way. A discount on repair labor in January, when technicians are fully booked with no-heat calls, would not.
Limits
The split assumes technicians' guaranteed pay is fixed, which is true month to month but not year to year, since the company could add or drop a technician. It also assumes the average call takes 1.5 hours, while a $99 tune-up may take less. Higgins et al. (2023) note that fixed and variable classifications depend on the time frame of the decision, and these figures hold for decisions within a season.
References
Datar, S. M., & Rajan, M. V. (2021). Horngren's cost accounting: A managerial emphasis (17th ed.). Pearson.
Garrison, R. H., Noreen, E. W., & Brewer, P. C. (2021). Managerial accounting (17th ed.). McGraw Hill.
Higgins, R. C., Koski, J. L., & Mitton, T. (2023). Analysis for financial management (13th ed.). McGraw Hill.
Reading the BUSI 3016 Week 7 instructions
The seventh week asks you to split one department's costs by how they behave, variable with each unit of work or fixed for the period, and to use the split. Start from a cost figure people in the organization already use and show how it was built. Then list costs with their behavior and amount, compute variable cost per unit and fixed cost per period, and show how they combine into the familiar average. Compute contribution margin per unit and the break-even volume. The most valuable part of the paper applies the split to a decision, such as a discount or a slow-season offer, showing where the average figure would mislead. Two to four pages with a cost table and readings from managerial accounting is typical.
How this BUSI 3016 Week 7 example is built
The analysis opens with the owner's $160 per call, built from about $68,300 of monthly costs over 427 calls. A table classifies seven costs: technician time, fuel and small materials per call, and base pay, van leases, the dispatcher and service manager share and software per month. Calculations give $71 variable per call, $38,000 fixed per month and about $89 of fixed cost per call at average volume. Contribution margin is $174 per $245 call, or 71 percent, citing Garrison and colleagues, and break-even is 219 calls. A decision section shows the $99 offer adding about $4,200 in April but costing $146 per displaced repair in July, citing Datar and Rajan. Limits address time frames, citing Higgins and colleagues.
BUSI 3016 Week 7 rubric: what earns full marks
Cost analysis papers are graded on classification, arithmetic and use. Each cost should be classified correctly, with the reasoning clear for borderline items such as guaranteed pay. The per-unit and per-period figures must be computed and shown, and the average the organization uses should be reconstructed from them so the reader trusts the split. Contribution margin and break-even must be correct. The strongest papers then apply the split to a decision and show how the average figure would have led to the wrong choice, ideally with both a case where the decision makes sense and one where it does not. Limits, especially that fixed costs are fixed only within a time frame, show understanding beyond the formula.
Common BUSI 3016 Week 7 mistakes, and how to avoid them
Get a month or year of costs for one department and the volume of work it did. Go line by line and ask whether each cost would rise if you did one more unit of work tomorrow. Group the ones that would as variable per unit and the rest as fixed per period. Rebuild the average cost from the two pieces to check your work. Then compute contribution margin and break-even, and look for a decision where the difference matters, such as a discount or a slow-month promotion. Weak analyses classify costs without explanation, stop at break-even or treat the average cost as the cost of one more unit. If you would like a model cost analysis for a department you know, share its costs and volume.
Get a BUSI 3016 Week 7 example written to your instructions
Your section's cost list, the prompt and the rubric are what the desk works from; each cost is sorted and carried through contribution and break-even in plain words, first one free, returned in 24 to 48 hours. The shop, its rent and its monthly call counts describe a pretend business, so none of it is a benchmark.
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BUSI 3016 Week 7 questions, answered
Where can I find a free BUSI 3016 Week 7 sample paper?
The complete cost behavior analysis, with its cost table and the $99 offer decision, appears in full on this page free of charge.
How does the BUSI 3016 Week 7 example split the $160 per call?
Into $71 that changes with each call and about $89 of fixed monthly cost spread over an average 427 calls.
What is the contribution margin per call?
$174: average revenue of $245 less variable cost of $71.
What is the break-even volume?
About 219 repair calls a month, the point at which contribution covers $38,000 of fixed costs.
When does the $99 tune-up offer make sense?
In slack months like April, when it adds $28 per call; not in July, when it would replace $245 repairs.