Required information [The following information applies to the questions displayed below.] Nation's Capital Fitness, Inc. operates a chain of fitness centers in the Washington, D.C., area. The firm's controller is accumulating data to be used in preparing its annual profit plan for the coming year. The cost behavior pattern of the firm's equipment maintenance costs must be determined. The accounting staff has suggested the use of the high-low method to develop an equation, in the form of Y = a + bx, for maintenance costs. Data regarding the maintenance hours and costs for last year are as follows: Hours of Maintenance Service 55 470 280 Month January February March April May June July August September October November December Total Average 480 330 470 360 420 460 380 380 Maintenance Costs $ 4,944 4,210 2,730 4,320 2,970 4,120 3,860 3,510 3,980 3,240 3,178 3,070 $43, 324 $ 3,610 370 4,950 413 Rounded Compute the predicted maintenance cost at 620 hours of activity. Maintenance cost