The Putney Company reports the following information: Sales $76,500 Cost of direct materials used in production 7,300 Depreciation on factory equipment 4,700 Indirect labor 5,900 Direct labor 10,500 Factory rent 4,200 Factory utilities 1,200 Sales salaries expense 15,600 Office salaries expense 8,900 Indirect materials 1,200 a. Compute product costs. $ b. Compute period costs.