Answer:
The correct answer is (a) 60%.
Explanation:
To calculate the net profit margin, we first need to calculate the net profit, which is the revenue minus the cost of goods sold (COGS) minus the operating expenses.
Revenue = $35
COGS = $7
Operating expenses = 20% of revenue = 0.2 x $35 = $7
Net profit = Revenue - COGS - Operating expenses
Net profit = $35 - $7 - $7 = $21
To calculate the net profit margin, we divide the net profit by the revenue and express it as a percentage:
Net profit margin = (Net profit / Revenue) x 100
Net profit margin = ($21 / $35) x 100
Net profit margin = 60%
Therefore, the correct answer is (a) 60%.