E-books, an online book retailer, has two operating departments - corporate sales and consumer sales-and two support departments - human resources and information systems. Each sales department conducts merchandising and marketing operations independently. E-books uses number of employees to allocate human resources costs and processing time to allocate information systems costs. The following data are available for September 2020: (Click the icon to view the data.) Read the requirements. ranking to allocate the support departments' costs to the operating departments based on the step-down method. First, rank, from highest to lowest, the support departments based on the percentage of their services provided to other support departments. (Round percentages to five decimal places.) Next, use this ranking to allocate the support departments' costs to the operating departments based on the step-down method. (Do n round intermediary calculations and round your final answers to the nearest whole dollar. Use parentheses or a minus sign when decreasing departments by allocating costs. Enter a "0" for any zero balances.) Data table