Q14 Marvel, Inc. analyzed its accounts receivable balances on December 31 and arrived at the aged balances listed below, along with the percentage that is estimated to be uncollectible: The company handles credit losses with the allowance method. The credit balance of the Allowance for Doubtful Accounts is $840 on December 31 , before any adjustments. 12 points a. Prepare the adjusting entry for estimated credit losses on December 31. b. Prepare the journal entry to write off Porter Company's account on the following May 12, in the amount of $680. c. Prepare the journal entry if Porter Company paid $400 for its account on Jun 10