please help me fill in

Karim Corporation requires a minimum $8,700 cash balance. Loans taken to meet this requirement cost 2% interest per month (paid at the end of each month). Any preliminary cash balance above $8,700 is used to repay loans at month-end. The cash balance on July 1 is $9,100, and the company has no outstanding loans. Budgeted cash receipts (other than for loans recelved) and budgeted cash payments (other than for loan or interest payments) follow. 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.)