Horton Manufacturing Incorporated produces blinds and other window treatments for residential homes and offices. The owner is concerned about the maintenance costs for the production machinery because maintenance costs for the previous fiscal year were higher than he expected. The owner has asked you to assist in estimating future maintenance costs to better predict the firm's profitability. Together, you have determined that the best cost driver for maintenance costs is machine hours. The data from the previous fiscal year for maintenance costs and machine hours follow: Required: 1. Use the high-low method to estimate the fixed and variable portions for maintenance costs. (In your calculations, round "slope (unit variable cost)" to 4 decimal places. Enter the "slope (unit variable cost)" rounded to 4 decimal places and all other calculations, to nearest whole dollar.) 2. Graph the dnta points to check for possible outlies and dctermine whether the points selected in requiremicet 1 are representative of the data. (Click each month and then click the graph to being up the data coordinates, Enter the wack coordinates for each month.) (1) 3. Calculate the menn absolute percentage error (MAPE) for Hhe cost equasion you developed in requirement th (hput your tira! answer as a percentege rounded to f decimal place (i. 054=5.44A)