An error was made by ABC Company in computing the percentage of completion of the current year's ending Work-in-Process Inventory. The error resulted in the assignment of a lower percentage of completion to each component of the inventory than actually was the case. There was no beginning Work-in-Process Inventory. What is the effect of this error on (1) cost assigned to cost of goods completed for the period and (2) the computation of costs per equivalent unit?
a. understated understated
b. understated overstated
c. overstated understated
d. overstated overstated