Answer and Explanation:
As per the data given in the question,
a) Bad debts expense A/c Dr. $12,200 ($305,000 × 4%)
To Allowance for doubtful accounts A/c $12,200
(Being bad debt expense of 4% credit sales is recorded)
b) Bad debts expense A/c Dr. $24,200 (($905,000 + 305,000) × 2%)
To Allowance for doubtful accounts A/c $24,200
(Being bad debt expense of 2% credit sales is recorded)
c) Bad debts expense A/c Dr. $14,600 (($130,000 × 7%) + $5,500)
To Allowance for doubtful accounts A/c $14,600
(Being bad debt expense of 7% of year-end accounts receivable is recorded)