Question

Income Statement
Revenue$26,937.00
Expenses$9,932.00
Pre-tax Profit$2,463.00
Profit$2,094.00
How does revenue affect profit (also called “net profit”)? How do expenses affect profit?
Income Statement
Moni's Breakfast Bliss

Month Ended March 31, 2015

Revenue
Gross Sales $24,937.00
Service Offerings $2,000.00
Total Revenue $26,937.00
Variable Expenses
Cost of Good Sold $3,232.00
Materials $1,077.00
Labor $2,154.00
Total Cost of Good Sold $6,463.00
Other Variable Expenses
Misc. Food Expenses $9,932.00
Service Expenses $3,200.00
Total Other Variable Expenses $3,469.00
Total Variable Expenses $9,932.00

Contribution Margin
$17,005.00
Fixed Operating Expenses
Advertising $1,077.00
Insurance $1,346.00
Parking $538.00
Salaries $9,427.00
Truck Maintenance $2,154.00
Total Fixed Expenses $14,542.00
Pre-tax Profit
$2,463.00
Taxes (15%) $369.00
Net Profit
$2,094.00

Answer 1

Short answer
- Revenue increases profit when the incremental revenue exceeds the variable costs tied to that revenue. The amount by which revenue increases pre‑tax profit is the contribution margin on that revenue.
- Expenses reduce profit. Variable expenses cut into the contribution margin (they rise with sales); fixed expenses reduce profit dollar‑for‑dollar but do not change with sales.

Key formulas
- Contribution margin = Revenue − Variable expenses
- Pre‑tax profit = Contribution margin − Fixed expenses
- Net profit = Pre‑tax profit − Taxes
- Contribution margin ratio = Contribution margin / Revenue
- Variable expense ratio = Variable expenses / Revenue

Numbers from your statement (Month ended March 31, 2015)
- Revenue = $26,937
- Variable expenses = $9,932 → variable expense ratio = 9,932 / 26,937 ≈ 36.9%
- Contribution margin = $17,005 → contribution margin ratio ≈ 63.1%
- Fixed expenses = $14,542
- Pre‑tax profit = $2,463 (≈ 9.1% of revenue)
- Taxes (15%) ≈ $369
- Net profit = $2,094 (≈ 7.8% net margin)

Concrete implications and examples
- How much of each $1 of extra revenue becomes profit? About $0.631 of each additional $1 of revenue increases pre‑tax profit (the contribution margin ratio), as long as variable costs stay in the same proportion.
- If revenue increases by $1,000 (same cost structure), pre‑tax profit rises by ≈ $631; after 15% tax the net increase ≈ $536.
- How do expense changes affect profit?
- A $1,000 reduction in variable expenses (at the same revenue) increases pre‑tax profit by $1,000 (net ≈ $850 after 15% tax).
- A $1,000 reduction in fixed expenses likewise increases pre‑tax profit by $1,000 (net ≈ $850).
- A $1,000 increase in fixed expenses lowers pre‑tax profit by $1,000 (net effect −$850 after tax).
- Break‑even revenue (pre‑tax) = Fixed expenses / Contribution margin ratio ≈ $14,542 / 0.631 ≈ $23,045. You are above break‑even, so you show profit.

What to focus on if you want higher net profit
- Increase revenue (higher prices, more sales, higher‑margin mix) — you earn the contribution margin on incremental sales.
- Lower variable costs (cheaper ingredients, better purchasing, reduce waste) — increases contribution margin directly.
- Reduce fixed costs (salaries, overhead) — improves profit once reduced.
- Improve sales mix toward higher‑margin items (service offerings may have different margins than gross sales).

If you’d like, I can:
- Run “what‑if” scenarios (e.g., raise prices 5%, reduce materials by 10%) and show effect on net profit, or
- Break down which expense lines give the biggest leverage for improvement.