The accompanying table describes the relationship between the number of workers hired by a call center each hour and the number of calls the call center can make each hour. The call center has only 1 telephone. The telephone costs the firm $5/hour (regardless of how many calls are made), and each worker is paid $10 per hour.
Average variable cost is minimized when output is approximately:

Question

The accompanying table describes the relationship between the number of workers hired by a call center each hour and the number of calls the call center can make each hour. The call center has only 1 telephone. The telephone costs the firm $5/hour (regardless of how many calls are made), and each worker is paid $10 per hour.   
Average variable cost is minimized when output is approximately:

Quizplus · Accepted Answer

The average variable cost of producing 22 units is approximately $4.55, which is the variable cost of 10 workers, $100 (= 10 × $10), divided by 22 units of output.

The Accompanying Table Describes the Relationship Between the Number of Workers