Larkspur Express reports the following costs and expenses in June 2022 for its delivery service. Indirect materials used $6,680 Drivers' salaries $16,640 Depreciation on delivery equipment 11,600 Advertising 4,880 Dispatcher's salary 5,200 Delivery equipment repairs 312 Property taxes on office building 940 Office supplies 676 CEO's salary 12,480 Office utilities 1,040 Gas and oil for delivery trucks 2,240 Repairs on office equipment 198 Determine the total amount of (a) delivery service (product) costs and (b) period costs. Delivery service (product) costs Period costs $ $