When using the weighted-average method of process costing, total equivalent units produced for a given period equal:
a. The number of units started and completed during the period plus the number of units in beginning work in process plus the number of units in ending work in process.
b. The number of units in beginning work in process plus the number of units started during the period plus the number of units remaining in ending work in process times the percentage of work necessary to complete the items.
c. The number of units in beginning work in process times the percentage of work necessary to complete the items plus the number of units started and completed during the period plus the number of units started this period and remaining in ending work in process times the percentage of work necessary to complete the items.
d. The number of units transferred out during the period plus the number of units remaining in ending work in process times the percentage of work necessary to complete the items.
e. None of these.