The debits to Work in ProcessAssembly Department for April, together with data concerning production, are as follows:

April 1, work in process:
Materials cost, 3,000 units	$ 7,500
Conversion costs, 3,000 units, 80% completed	6,000
Materials added during April, 10,000 units	29,000
Conversion costs during April	35,000
Goods finished during April, 11,500 units
April 30 work in process, 1,500 units, 60% completed

All direct materials are placed in process at the beginning of the process, and the average cost method is used to cost inventories. The materials cost per equivalent unit (rounded to the nearest cent) for April is

a.$2.26

b.$2.81

c.$2.60

d.$3.02