Grawburg Incorporated maintains a call center to take orders, answer questions, and handle complaints. The costs of the call center for a number of recent months are listed below: Call Center Cost April May June July August September October Calls Taken 6,781 $ 73,515 6,750 $ 73,313 6,791 $ 73,584 6,787 $ 73,535 6,757 $ 73,368 6,767 $ 73,412 6,809 6.793 $ 73,683 $ 73,579 November Management believes that the cost of the call center is a mixed cost that depends on the number of calls taken. Required: Estimate the variable cost per call and fixed cost per month using the least-squares regression method. (Round the "Variable cost" to 2 decimal places and the "Fixed cost" to the nearest dollar amount.) Variable cost Fixed cost per call per month