The following information relates to myer, inc.: advertising costs $ 13 comma 600 sales salary 18 comma 800 sales revenue 640 comma 000 president's salary 320 comma 000 office rent 78 comma 000 manufacturing equipment depreciation 1 comma 800 indirect materials used 8 comma 800 indirect labor 15 comma 000 factory repair and maintenance 800 direct materials used 27 comma 500 direct labor 36 comma 000 delivery vehicle depreciation 1 comma 150 administrative salaries 22 comma 500 how much were myer's product costs?