Muscat Company has provided you with the following information for the month of March: Sales revenue $50.400 Selling and Administrative Expenses $8,500 Direct materials purchased $5,000 Direct labor $7,000 Manufacturing overhead applied $10,000 aterials Inventories: Raw materials Work in process Finished goods Beginning $8,000 $5,000 $70,000 End $9,000 $3,000 $66,000 Calculate the following for the month of March: a. Costs of goods manufactured b. Costs of goods sold c. Gross profit d. Operating Income