A key idea in process costing that refers to the number of units that could have been started and completed given the costs incurred during the period is known as:

A) Manufacturing overhead.
B) Units in process.
C) A job cost sheet.
D) Equivalent units of production.
E) Process cost summary.

The key idea in process costing that refers to the number of units that could have been started and completed given the costs incurred during the period is known as equivalent units of production. This concept is used to calculate the cost per unit and to determine the amount of cost that is allocated to each unit of output.