The Table Below Provides Information on Output Per Month and Short-Run

Multiple Choice

The table below provides information on output per month and short-run costs for a firm producing outdoor wooden lounge chairs.All costs are in dollars.
TABLE 7-5
-Refer to Table 7-5.What is the average variable cost of producing 10 chairs?

A) $22
B) $42
C) $200
D) $220
E) $420