Part 1 of problem may be wrong

The number of X-rays taken and X-ray costs over the last nine months in Beverly Hospital are given below: 1. Using the high-low method, estimate the cost formula for X-ray costs. (Round the "Variable cost per X-ray" to 2 decimal places and the "Fixed cost" to the nearest dollar amount. Omit the "$" sign in your response.) Y = $ -2444 + $ 2.20 X 2. Using the cost formula you derived above, what X-ray costs would you expect to be incurred during a month in which 4,650 X-rays are taken? (Omit the "$" sign in your response.)