Trainor Company estimates bad debt expense using a percentage of credit sales (5%). The company began its current year with an $8,500 balance in the allowance account. During the current year, $10,500 of accounts receivable were written off, and $1,200 of previously written off accounts were collected. Credit sales for the year were $255,000. The bad debt expense for the year wasa) $12,750b) $11,550c) $10,500d) $8,500