MAH company uses process costing. MAH calculates unit costs under the weighted-average process-costing method, the unit cost is based on:

a.only the current period's manufacturing costs.

b.only costs in the period's beginning work-in-process inventory.

c.Some other basis not listed here.

d.only costs incurred in previous accounting periods.

e.a summation of the costs in the beginning work-in-process inventory plus costs to be incurred in the upcoming period.