Mr Bogasu the English teacher of the grade 12 learners planned to resign at the end of the year and become a taxi owner as he has lost interest in his work. The following is a sample of income and expenses of one month from one taxi owner mentoring him.

income :R15900
expenses:
Taxi R350
Taxi R450
insurance R362
maintenance cost:
car R80
fuel R9500
repairs R600

Total of income:R15900
Total of expenses:R11342

1. What are variable cost ?
2. List three variable cost.
3. Did mentor make profit? show all calculations.
4. Determine the mentor 's profit margin. Round off to two decimal numbers.
5. How can the mentor increase his profit?​