Jan. 19. Sold merchandise on account to Dr. Kyle Norby, $57,200. The cost of goods sold was $30,900. June 2. Received $13,700 from Dr. Kyle Norby and wrote off the remainder owed on the sale of January 19 as uncollectible. Oct. 23. Reinstated the account of Dr. Kyle Norby that had been written off on June 2 and received $43,500 cash in full payment