THE FORMULA =DAY360(C8,D8,)in part one is marking it as wrong. Is there another formula or is it wrong?? please help!!

include the excel formulas please

1. Prepare an aging of accounts receivable and compute bad debt expense. x] Aging of accounts receivable method - Excel ? 5 FILE HOME INSERT PAGE LAYOUT FORMULAS DATA REVIEW VIEW Sign In X Calibri 11 AR A % Paste B I U >A- Alignment Number Cells Editing Conditional Format as Cell Formatting Table Styles Styles Clipboard Font > B23 fo B C D E 1 F Xercise Cycles Company sells exercise equipment to gyms on account. At year end, the following accounts receivable were uncollected. 2 3 Required: 1) Calculate the number of days unpaid, USING THE EXCEL DAYS FUNCTION (fx). 4 5 6 Number of Days Unpaid $ 7 Customer 8 Fitness Mania 9 Health for Life 10 Holistic Health Options 11 Image Reimaging 12 Today's Gym World 13 Whole Life Fitness Center 14 Workouts Unlimited 15 Total Amount 2,500 2,000 12,750 7,000 4,600 15,900 3,800 48,550 Invoice Date 6/17/2016) 12/21/2016 10/12/2016 12/5/2016 11/29/2016 11/20/2016 10/2/2016 Today's Date 12/31/2016 12/31/2016 12/31/2016 12/31/2016 12/31/2016 12/31/2016 12/31/2016 $ 16 7 2) Use the information above to complete the Aging of Accounts Receivable Schedule below. 8 Create a formula for each age category, using the Excel IF and AND FUNCTIONS (fx) to determine where each customer amount belongs. 9 The IF statement may include the following arguments: ,>5,