any change in net working capital. Assume a 21% tax rate on ordinary income a. Calculate the book value of the existing computer system. b. Calculate the after-tax proceeds of its sale for $204,000. c. Calculate the initial cash flow associated with the replacement project. a. The remaining book value is $. (Round to the nearest dollar.) Data table (Click on the icon here in order to copy the contents of the data table below into a spreadsheet.) Rounded Depreciation Percentages by Recovery Year Using MACRS for First Four Property Classes *These percentages have been rounded to the nearest whole percent to simplify calculations while retaining realism. To calculate the actual depreciation for tax purposes, be sure to apply the actual unrounded percentages or directly apply double-declining balance (200%) depreciation using the half-year convention