Department E had 4,000 units in Work in Process that were 40% completed at the beginning of the period at a cost of $12,500. 14,000 units of direct materials were added during the period at a cost of $28,700. 15,000 units were completed during the period, and 3,000 units were 75% 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 conversion if the first-in, first-out method is used to cost inventories was:

Total equivalent unit = 19,650

Explanation:

To apportion cost between work in progress and completed units in a particular period, we use equivalent units. Equivalents units are notional whole units which represent incomplete work and are used to apportion cost between completed units and work in progress

Equivalent Units = Degree of Completion × Units of inventory

Under the first in first out(FIFO) method, to account for the units of work completed the opening inventory are separated and distinguished from the units newly introduced in the period.

Another principle under this method is that only the percentage of work yet to be completed on the units of opening are done in the current period

Fully worked = 14,000- 3,000 = 11,000

The fully worked represents units of inventory started this current period and completed in the same period

Item                              Units           Working                  Equivalent unit

Opening inventory       4,000        60%× 4,000                    2,400

Fully worked                15,000          100% × 15,000               15,000

Closing inventory         3,000           75% × 3,000                   2250

Total equivalent unit                                                               19,650

Total equivalent unit = 19,650

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