Aaron Company has a process costing system. All materials are introduced when conversion costs reach 50 percent. The following information is available for physical units during March.

Work in process, March 1 (60% complete as to conversion costs)	150,000
Units started in March	600,000
Units transferred to Finishing Department in March	630,000
Work in process, March 31 (40% complete as to conversion costs)	120,000

Required:

a. Compute the equivalent units for materials costs and for conversion costs using the weighted-average method.

b. Compute the equivalent units for materials costs and for conversion costs using the FIFO method.

c. The company president has been under considerable pressure to increase income. He tells the controller to change the estimated completion for ending work in process to 60 percent (from 40 percent).

c-1. What effect will this change have on the unit costs of units transferred to finished goods in March?

c-2. Would this be ethical?

c-3. Is this likely to be a successful strategy for affecting income over a long period of time?