How do you calculate C? I know how to do the others.Thanks for your help.

Calculating initial investment Dupree Coffee Roasters, Inc., wishes to expand and modernize its facilities. The installed cost of a proposed computer-controlled automatic-feed roaster will be $131,000. The firm has a chance to sell its 3-year-old roaster for $34,100. The existing roaster originally cost $59,700 and was being depreciated using MACRS and a 7-year recovery period (see the table B). DuPree is subject to a 40% tax rate. a. What is the book value of the existing roaster? b. Calculate the after-tax proceeds of the sale of the existing roaster. c. Calculate the change in net working capital using the following figures: Anticipated Changes in Current Assets and Current Liabilities Accruals - $20,000 Inventory + 49,300 Accounts payable + 40,100 Accounts receivable + 70,700 a. The remaining book value of the existing roaster is $ 25671. (Round to the nearest dollar.) b. The after-tax proceeds of the sale of the existing roaster will be $ 30728. (Round to the nearest dollar.) c. The change in net working capital will be $ 85,200 (Round to the nearest dollar.) d. The initial investment associated with the proposed new roaster will be $ 185472. (Round to the nearest dollar.) i - Data Table 9% (Click on the icon here e 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 Percentage by recovery year* Recovery year 3 years 5 years 7 years 10 years 1 33% 20% 14% 10% 2 45% 32% 25% 18% 3 15% 19% 18% 14% 4 7% 12% 12% 12% 5 12% 9% 6 5% 9% 8% 7 9% 8 4% 6% 9 6% 10 6% 11 4% Totals 100% 100% 100% 100% *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. 7%