The following information is available for Department X for the month of August: Work in process, August 1: Materials $ 8,480 Conversion costs $15,900 Costs added during August: Materials $29,680 Conversion costs $26,500 Equivalent units of production (weighted average): Materials 4,240 Conversion 5,300 Department X's cost per equivalent unit for conversion using the weighted average method would be:

a.$3.00.

b.$9.00.

c.$8.00.

d.$5.00.