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