What is the cash realizable value of the accounts receivable before the write-off and after the write-off?

At the end of 2017, Carpenter Co. has accounts receivable of $729, 400 and an allowance for doubtful accounts of $61, 200. On January 24, 2018, the company learns that its receivable from Megan Gray is not collectible, and management authorizes a write-off of $7, 300