Single plantwide factory overhead rate Platzer Instruments Inc. makes three musical instruments: flutes, clarinets, and oboes. The budgeted factory overhead cost is $111,680. Overhead is allocated to the three products on the basis of direct labor hours. The products have the following budgeted production volume and direct labor hours per unit: If required, round all per unit answers to the nearest cent. a. Determine the single plantwide overhead rate. $ per direct labor hour b. Use the overhead rate in (a) to determine the amount of total and per-unit overhead allocated to each of the three products