Use the Following to Answer Questions

Multiple Choice

Use the following to answer questions:
-(Table: Production Function for Soybeans) Look at the table Production Function for Soybeans. Assume that the fixed input, capital, is 10 acres of land and a tractor, which have a combined cost of $150 per day. The cost of labor is $100 per worker per day. The variable cost of producing 60 bushels of soybeans is:

A) $5.
B) $100.
C) $150.
D) $300.