Can you help me with this one?

EX 9-3 Entries for uncollectible accounts, using direct write-off method OBJ. 3 Journalize the following transactions in the accounts of Arrow Medical Co., a medical equipment company that uses the direct write-off method of accounting for uncollectible receivables: Jan. 19. Sold merchandise on account to Dr. Sinclair Welby, $77,000. The cost of the merchandise sold was $52,600. July 7. Received $30,800 from Dr. Sinclair Welby and wrote off the remainder owed on the sale of January 19 as uncollectible. Nov. 2. Reinstated the account of Dr. Sinclair Welby that had been written off on July 7 and received $46,200 cash in full payment