The debts to work in Process Assembly Department for May, together with data concerning production are as follows: May 1, work in process: Materials cost, 3,000 units $8,500 Conversion costs, 3,000 units, 50% completed 5,300 Materials added during May, 10,000 units 26,700 Conversion costs during May 31,200 Goods finished during May, 11,500 units May 31 work in process, 1.500 units, 50% completed All direct materials are placed in process at the beginning of the process, and the first in first-out method is used to cost inventories. The materials cost per equivalent unit for May is O $2.32 d. 52.67