Sabre Company buys tiles and prints different designs on them for souvenir and gift stores. The company keeps on hand a stock equal to 25% of the next month's sales. The tiles cost $3 and are eventually sold for $12 each. The company has 3,100 tiles in stock at the start of the year Jan. 1. Sabre pays its suppliers 80% of purchases in the month of purchase, and 20% in the month following the purchase. Sales estimates (in units) for the next four months follow below: January 12,400; February 17,800; March 13,200; April 14,200. Determine cash disbursements for purchases for the months of February and March. Determine the ending inventory and accounts payable balances as of March 31.