Manhof Co. prepares supplementary reports on income from continuing operations on a current cost basis. How should Manhof compute cost of goods sold on a current cost basis?

a. Number of units sold times average current cost of units during the year.

b. Number of units sold times current cost of units at year-end.

c. Number of units sold times current cost of units at the beginning of the year.

d. Beginning inventory at current cost plus cost of goods purchased less ending inventory at current cost.