Department Z had no work in process at the beginning of the period, 18,000 units were started during the period, 2,000 units were 30% completed at the end of the period, and the following manufacturing costs were debited to the departmental work in process account during the period (assuming the company uses FIFO):

Direct materials $80,100
Direct labor 102,300
Factory overhead 37,140

Assuming that all direct materials are placed in process at the beginning of production, what is the total cost of the units completed during the period?

a.$205,600 b.$213,310 c.$80,100 d.$134,400