accounting 2: Budgeted Cash Payments (Just need a little help, problem is inclonplete and i dont know whats wrong

Hector Company reports the following: Sales Purchases July August $28,000 $35,000 17,920 23,040 September $40,000 28,000 Payments for purchases are made in the month after purchase. Selling expenses are 18% of sales, administrative expenses are 8% of sales, and both are paid in the month of sale. Rent expense of $3,400 is paid monthly. Depreciation expense is $1,900 per month Prepare a schedule of budgeted cash payments for August and September. HECTOR COMPANY Budgeted Cash Payments For August and September August September Payments for Seling expenses $ 6,480 $ 7,200 Administrative expenses 2.880 3,200 Rent expense 3,400 3,400 Total budgeted cash payments $ 12,760 $ 13,800