Freddie Company adds direct materials at the beginning of the process and adds conversion costs throughout the process. Data for the Finishing Department follows:

WIP, April 1	13,000 units
Transferredsin costs in WIP, April 1	$79,940
Direct materials (100%) in WIP, April 1	$24,420
Conversion costs (70%) in WIP, April 1	$25,400
Units transferredin	52,000
Transferredin costs during April	$550,900
Units completed	43,000
April direct materials cost	$155,500
April conversion costs	$242,250
WIP, April 30	22,000 units
(100% for materials and 3030% for conversion costs)

The cost per equivalent unit for conversion costs would be closest to

a. $5.71

b. $4.12

c. $4.58

d. 5.40