Jameson's Manufacturing Inc.'s debits to Work in Process-Assembly Department for July, together with data concerning production, are as follows:

July 1, work in process:
Materials cost, 3,000 units	$ 8,000
Conversion costs, 3,000 units, 66.7% completed	6,000
Materials added during July, 10,000 units	30,000
Conversion costs during July	31,000
Goods finished during July, 11,500 units	0
July 31 work in process, 1,500 units, 50% completed	0

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 July is