What am I missing here, regarding the red "X" marks?

Karim Corporation requires a minimum $8,600 cash balance. Loans taken to meet this requirement cost 1% Interest per month (paid at the end of each month). Any preliminary cash balance above $8,600 is used to repay loans at month-end. The cash balance on July 1 Is $9,000, and the company has no outstanding loans. Budgeted cash receipts (other than for loans received) and budgeted cash payments (other than for loan or Interest payments) follow. July August September Cash receipts $ 24,600 $ 32, 600 $ 40, 608 Cash payments 28, 980 30, 600 32, 600 Prepare a cash budget for July, August, and September. (Negative balances and Loan repayment amounts (If any) should be Indicated with minus sign. Round your final answers to the nearest whole dollar.) X Answer is not complete. KARIM CORP. Cash Budget July August September Beginning cash balance 9.000 S 8.600 S 8,600 Add: Cash receipts 24.600 32.600 40.600 Total cash available 33,600 41.200 19.200 Less: Cash payments for All items excluding interest 28,900() 30.600 32.600 Total cash payments 28,900 30.600 32.600 Preliminary cash balance S 0 X 5 3,800 (X)S 1,939 (X Loan activity Additional loan (loan repayment) 2.900( Ending cash balance Loan balance Loan balance - Beginning of month Additional loan (loan repayment) 3,900 Loan balance - End of month