The $37,000 beginning balance of inventory consists of 370 units, each costing $100. During January 2021, Big Blast Fireworks had the following inventory transactions: January 3 Purchase 1,600 units for $168,000 on account ($105 each). January 8 Purchase 1,700 units for $187,000 on account ($110 each). January 12 Purchase 1,800 units for $207,000 on account ($115 each). January 15 Return 135 of the units purchased on January 12 because of defects. January 19 Sell 5,200 units on account for $780,000. The cost of the units sold is determined using a FIFO perpetual inventory system. January 22 Receive $753,000 from customers on accounts receivable. January 24 Pay $520,000 to inventory suppliers on accounts payable. January 27 Write off accounts receivable as uncollectible, $3,200. January 31 Pay cash for salaries during January, $121,000. The following information is available on January 31, 2021. At the end of January, the company estimates that the remaining units of inventory are expected to sell in February for only $100 each. The company estimates future uncollectible accounts. The company determines $4,700 of accounts receivable on January 31 are past due, and 35% of these accounts are estimated to be uncollectible. The remaining accounts receivable on January 31 are not past due, and 5% of these accounts are estimated to be uncollectible. (Hint: Use the January 31 accounts receivable balance calculated in the general ledger.) Accrued interest expense on notes payable for January. Interest is expected to be paid each December 31. Accrued income taxes at the end of January are $13,000.