its one calculation is wrong please solve it

Flower Catering provides catering to downtown offices. The company estimated there will be $63,200 in food inventory at the beginning of December 2020. Flower Catering wants to have half of that amount in its inventory at the end of December. Based on the forecast, cost of food sales in December will be $127,400. Do not enter dollar signs or commas in the input boxes. Use the negative sign for negative values or values that must be subtracted, Prepare a purchases budget. Flower Catering Purchases Budget Month Ending December 31, 2020 127400 Budgeted Cost of Sales Required Ending Inventory Budgeted Beginning Inventory 31600 Required Purchases 63200 159000