At December 31, 2009, Petra Supply Ltd. had the following account balances: Accounts Receivable $50,000 Debit Allowance for Doubtful Accounts 4,570 Debit PART A Petra estimates that $7,000 of its accounts receivable will become uncollectible. 1) Prepare the journal entries required on December 31, 2009. Bad debt expense 2430 Allowance for bad debt 2430 PART B On February 4, 2010, Petra determined that John Wolton's account was uncollectible and wrote off $1,570. 1) Prepare the journal entries required on February 4, 2010.