Johnson & Johnson produces 20,000 units of medical devices, incurring total manufacturing costs of $3,000,000. The breakdown of manufacturing costs includes:

• Direct Materials: $1,200,000
• Direct Labor: $800,000
• Manufacturing Overhead: $1,000,000 

Calculate:. b) Gross profit percentage based on a selling price of $200 per unit. c) Net profit if the tax rate is 25%