| | Solution |
| a | Breakeven sales is calculated with the help of the following formula: |
| | Profits = 0 = Revenue - cost of goods sold - fixed costs |
| | 0 = R - 0.5R - 63000 - 0.3R |
| | 0.47 = | 63000 |
| | R = | 134042.553191489 |
| | So the break even is | 134042.553191489 |
| b | Dr Zang should accept the revised lease agreement. |
| | | 13333 + 3% lease | 1000 + 12.5% lease |
| | Revenues | 150000 | 150000 |
| | Cost of goods sold | 75000 | 75000 |
| | Fixed rent | 13333 | 1000 |
| | Lease fees as % sales | 4500 | 18750 |
| | Interest on bank loan | 11667 | 10500 |
| | Other costs | 38000 | 38000 |
| | Profit | 7500 | 6750 |
| | With the fluctuation on p[rofits, if revenue is between 80000 to 220000 |
| | | 13333 + 3% lease | | 1000 + 12.5% lease |
| | Revenue |
| | Revenues | 80000 | 220000 | 80000 | 220000 |
| | Cost of goods sold | 40000 | 110000 | 40000 | 110000 |
| | Fixed rent | 13333 | 13333 | 1000 | 1000 |
| | Lease fees as % sales | 2400 | 6600 | 10000 | 27500 |
| | Interest on bank loan | 11667 | 11667 | 10500 | 10500 |
| | Other costs | 38000 | 38000 | 38000 | 38000 |
| | Profit | -25400 | 40400 | -19500 | 33000 |