For the same transactions, why does the weighted-average cost method provide different value for ending inventory and COGS depending on whether the periodic or perpetual inventory system is used?

Select one: a. Perpetual inventory calculates and assigns costs as items are sold, while periodic inventory calculates and assigns costs at the end of the period.

b. Perpetual inventory calculates and assigns costs at the end of the period, while periodic inventory calculates and assigns costs as items are sold.

c. Perpetual inventory counts all the purchases for the month first before calculating the average cost, while periodic calculates the average cost after every transaction.

d. Perpetual inventory and periodic inventory will not provide different values using