Department B had 3,000 units in Work in Process that were 25% completed at the beginning of the period at a cost of $12,500. 13,700 units of direct materials were added during the period at a cost of $28,700. 15,000 units were completed during the period, and 1,700 units were 95% completed at the end of the period. All materials are added at the beginning of the process. Direct labor was $32,450, and factory overhead was $18,710. The number of equivalent units of production for the period for materials if the first-in, first-out method is used to cost inventories was a.13,700

Number of equivalent units= 13,700

Explanation:

All materials are added at the beginning of the process.

To calculate the equivalent units using the FIFO method, we need to use the following structure:

Beginning work in process = beginning inventory* %incompleted

Units started and completed = units completed - beginning WIP

Ending work in process completed= Ending WIP* %completed

=Number of equivalent units

Replacing:

Beginning work in process = 3,000*0%= 0

Units started and completed =  15,000 - 3,000= 12,000

Ending work in process completed= 1,700*100%= 1,700

Number of equivalent units= 13,700

answer; i believe the correct answer is (a) purchase of treasury stock;