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.At what level of output is this firm at its capacity?

A) 10 chairs
B) 15 chairs
C) 20 chairs
D) 25 chairs
E) 30 chairs