Start Excel. Download and open the file named Exp19_ExceI_Ch05_ML1_ReaIEstate.xst. Grader has automatically added your last name to the beginning of the filename. Before subtotaling the data, you want to calculate the selling price as a percentage of the asking price. In cell G2 in the Sales Subtotals sheet, insert a formula to calculate the selling price percentage of the asking price, format it with Percent Style with one decimal place, and then copy the formula down the column. Real estate agents often analyze how long houses are on the market. You will calculate the number of days between the listing date and the sale date. In cell .12, enter a formula to calculate the number of days between the listing date and sale date. Copy the formula down the column. You are about ready to subtotal the data. First, you will sort the data. Sort the list by City in alphabetical order, then by Selling Agent in alphabetical order, and finally by Listing Date in chronological order