Olsen Company processes lumber into a product called medium density fiberboard.

For the month of February, it had 80,000 square feet of medium density fiberboard in process at the beginning of the month. Another 500,000 square feet were put into process during February, and 60,000 square feet were still in process at the end of February.

All materials, including transferred-in materials, are added at the beginning of the process. Conversion costs are incurred uniformly throughout the production process. The ending work-in-process inventory of 60,000 units was 60% complete with respect to conversion costs.

Using the FIFO method, what are total equivalent units with respect to transferred-in costs in February? Group of answer choices

A. 500,000 square feet

B. Cannot be determined from this information.

C. 580,000 square feet

D. 488,000 square feet