A music company has these costs: Classify each cost as a period or a product cost. Within the product cost category, indicate if the cost is part of direct materials (DM), direct labor (DL), or manufacturing overhead (MO). AdvertisingPaper inserts for CD casesBlank CDsCD plastic casesDepreciation of CD image burnerSalaries of sales representativesSalary of factory managerSalaries of factory maintenance employeesFactory supplies usedSalaries of employees who burn music onto CDs Solution.