Marin Express reports the following costs and expenses in June 2022 for its delivery service. Indirect materials used $5,380 Drivers' salaries $13,440 Depreciation on delivery equipment 9,400 Advertising 3,880 Dispatcher's salary 4,200 Delivery equipment repairs 252 Property taxes on office building 740 Office supplies 546 CEO's salary 10,080 Office utilities 840 Gas and oil for delivery trucks 1,840 Repairs on office equipment 158 Determine the total amount of (a) delivery service (product) costs and (b) period costs. Delivery service (product) costs $ $ Period costs $