Kodama Corporation Staffs a Helpline to Answer Questions from Customers

Multiple Choice

Kodama Corporation staffs a helpline to answer questions from customers. The costs of operating the helpline are variable with respect to the number of calls in a month. At a volume of 30,000 calls in a month, the costs of operating the helpline total $369,000. To the nearest whole cent, what should be the average cost of operating the helpline per call at a volume of 31,300 calls in a month? (Assume that this call volume is within the relevant range.)

A) $12.30
B) $11.79
C) $10.92
D) $12.05