3. Kristas sells $4,000 worth of goods in December, $2,800 worth in January, $3,200 in February and $3,500 in March. The wholesale cost is 65 percent of the retail price. The firm has a receivables period of 30 days, a payables period of 60 days, and buys inventory one month prior to selling it. What is the accounts payable balance at the end of January?