ABC Ltd. has the following information for the year ended December 31, 2022:

• Beginning inventory: $40,000
• Purchases: $200,000
• Ending inventory: $50,000
• Sales revenue: $300,000
• Cost of goods sold: $170,000
• Operating expenses: $50,000
• Interest expense: $10,000
• Income tax rate: 30%

Calculate the following for ABC Ltd.:

a) Gross profit b) Net profit

c) Gross profit margin

d) Net profit margin

Show all calculations and round to two decimal places.