Final answer:
To estimate the appropriate year-end balance for the allowance for doubtful accounts, calculate the estimated loss for each age group of accounts receivable and total them up. If the unadjusted balance in the allowance for doubtful accounts is a debit balance, adjust it to a credit balance by adding the amount of bad debt expense.
Step-by-step explanation:
To estimate the appropriate year-end balance for the allowance for doubtful accounts, we need to calculate the estimated loss for each age group of accounts receivable and then total them up. We'll multiply the balance of each age group by the average loss rate for that group.
For example, for the 1 to 30 days old group, the estimated loss would be 5% of $11,500, which is $575. We'll do the same calculation for the other two groups and then add up the total losses. In this case, the estimated year-end balance for the allowance for doubtful accounts would be $575 + $450 + $500, which is $1,525.
If the unadjusted balance in the allowance for doubtful accounts was a $550 debit balance, we need to adjust it to a credit balance by adding the amount of bad debt expense. In this case, the bad debt expense would be $1,525 - $550, which is $975. Therefore, $975 should be recorded as bad debt expense on December 31.