Can I get an explanation for how you arrive at the answer?

Credit Losses Based on Accounts Receivable Graham, Inc, analyzed its accounts receivable balances at December 31, and arrived at the aged balances listed below, along with the percentage that is estimated to be uncollectible: Balance 0-30 days past due $180,000 31-60 days past due26,000 61-120 days past due28,000 21-180 days past due 15,000 Over 180 days past due 10,000 $259,000 Probability of Noncollection 1% 3% 696 10% 20% Age Group The company handles credit losses using the allowance method. The credit balance of the Allowance for Doubtful Accounts is $1,640 on December 31, before any adjustments a. Prepare the adjusting entry for estimated credit losses on December 31 b. Prepare the journal entry to write off the Matthews Company's account on April 10 of the following year in the amount of $1,280