Answer: 100 paintings
Explanation:
To calculate the breakeven point, use the following formula:
= Fixed cost / Contribution margin
The Fixed cost is the one that does not change which is the $100 spent on brushes.
Contribution margin = Sales price - variable cost(cost that he incurs per painting)
= 10 - 9
= $1
Breakeven point = 100/1
= 100 paintings