John's assembly service provided the following data for the assembly department for January 2013:

Physical Unit for January 2013

Work in process beginning inventory ( January 1) 0units

started during January 600units

completed and transferred out 600units

work in process, ending inventory(January 31) 0units

Total Costs for January 2013

direct materials costs added during January $36,000

conversion costs added during January 24,000

Total assembly department cost added during January $60,000

Required: Compute the direct material cost per unit; the conversion cost per unit; and the total department cost per unit.

A. $20; $30; $80.

B. $70; $30; $100.

C. $40; $60; $80.

D. $60; $40; $100.

E. $80; $10; $90

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