Question 1 · Short Answer & Calculation
10 marksZest & Go is a boutique health bar specializing in organic fruit smoothies. The owner has compiled the following financial data for the upcoming year:
- Selling price per smoothie: \($6.00\)
- Variable cost per smoothie: \($2.40\)
- Annual fixed costs (including rent): \($18,000\)
(a) Calculate the break-even level of output (in units) per year. [3 marks]
(b) Calculate the margin of safety (in units) if Zest & Go expects to sell 12,500 smoothies. [2 marks]
(c) Explain the effect of an increase in annual rent (fixed costs) of 10% on both the break-even level of output and the margin of safety. [5 marks]
- Selling price per smoothie: \($6.00\)
- Variable cost per smoothie: \($2.40\)
- Annual fixed costs (including rent): \($18,000\)
(a) Calculate the break-even level of output (in units) per year. [3 marks]
(b) Calculate the margin of safety (in units) if Zest & Go expects to sell 12,500 smoothies. [2 marks]
(c) Explain the effect of an increase in annual rent (fixed costs) of 10% on both the break-even level of output and the margin of safety. [5 marks]
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Worked solution
(a) Calculate break-even level of output:
\(\text{Contribution per Unit} = \text{Price} - \text{Variable Cost} = \$6.00 - \$2.40 = \$3.60\)
\(\text{Break-even Quantity} = \frac{\text{Fixed Costs}}{\text{Contribution per Unit}} = \frac{\$18,000}{\$3.60} = 5,000 \text{ units}\)
(b) Calculate margin of safety:
\(\text{Margin of Safety} = \text{Expected Sales} - \text{Break-even Quantity}\)
\(\text{Margin of Safety} = 12,500 - 5,000 = 7,500 \text{ units}\)
(c) Effect of a 10% increase in fixed costs:
- New fixed costs: \(\$18,000 \times 1.10 = \$19,800\)
- New break-even level: \(\frac{\$19,800}{\$3.60} = 5,500 \text{ units}\)
- New margin of safety: \(12,500 - 5,500 = 7,000 \text{ units}\)
When fixed costs increase, the business must sell more units to cover these fixed overheads before starting to generate profit. Consequently, the break-even point rises (by 500 units). As a result of this higher threshold, the buffer zone between the target sales and break-even (margin of safety) shrinks (by 500 units), indicating higher financial risk.
\(\text{Contribution per Unit} = \text{Price} - \text{Variable Cost} = \$6.00 - \$2.40 = \$3.60\)
\(\text{Break-even Quantity} = \frac{\text{Fixed Costs}}{\text{Contribution per Unit}} = \frac{\$18,000}{\$3.60} = 5,000 \text{ units}\)
(b) Calculate margin of safety:
\(\text{Margin of Safety} = \text{Expected Sales} - \text{Break-even Quantity}\)
\(\text{Margin of Safety} = 12,500 - 5,000 = 7,500 \text{ units}\)
(c) Effect of a 10% increase in fixed costs:
- New fixed costs: \(\$18,000 \times 1.10 = \$19,800\)
- New break-even level: \(\frac{\$19,800}{\$3.60} = 5,500 \text{ units}\)
- New margin of safety: \(12,500 - 5,500 = 7,000 \text{ units}\)
When fixed costs increase, the business must sell more units to cover these fixed overheads before starting to generate profit. Consequently, the break-even point rises (by 500 units). As a result of this higher threshold, the buffer zone between the target sales and break-even (margin of safety) shrinks (by 500 units), indicating higher financial risk.
Marking scheme
(a) [3 marks]
- 1 mark for calculating correct contribution per unit ($3.60) or showing correct formula.
- 1 mark for correct working shown.
- 1 mark for correct break-even unit answer (5,000 units).
(b) [2 marks]
- 1 mark for showing correct formula or working.
- 1 mark for correct margin of safety (7,500 units).
(c) [5 marks]
- 1 mark for calculating the new break-even point (5,500 units).
- 1 mark for calculating the new margin of safety (7,000 units).
- 3 marks for clear explanation of the relationship: explaining that an increase in fixed costs requires more total contribution to cover them, thereby raising the break-even point, which directly erodes the margin of safety by the same volume (500 units) assuming demand remains constant.
- 1 mark for calculating correct contribution per unit ($3.60) or showing correct formula.
- 1 mark for correct working shown.
- 1 mark for correct break-even unit answer (5,000 units).
(b) [2 marks]
- 1 mark for showing correct formula or working.
- 1 mark for correct margin of safety (7,500 units).
(c) [5 marks]
- 1 mark for calculating the new break-even point (5,500 units).
- 1 mark for calculating the new margin of safety (7,000 units).
- 3 marks for clear explanation of the relationship: explaining that an increase in fixed costs requires more total contribution to cover them, thereby raising the break-even point, which directly erodes the margin of safety by the same volume (500 units) assuming demand remains constant.