At the beginning of the year, accounts receivable were $45,000 and the allowance for bad debts was $4,200. During the year, sales (all on account) were $180,000, cash collections were $165,000, bad debts expense totaled $3,100, and $2,600 of accounts receivable were written off as bad debts.The balance at the end of the year for the Accounts Receivable account was: O O O $42,400. $54,300. $57,400. $60,000