Final answer:
The balance in the Accounts Receivable account after the April 31 monthly adjusting entry will be a debit balance of $7,000. The correct answer is option C.
Step-by-step explanation:
The balance in the Accounts Receivable account after the April 31 monthly adjusting entry will be a debit balance of $7,000.
Since the revenue is earned evenly over the six-month job, each month Techno Technical Services would recognize 1/6th of the total revenue. In this case, the total revenue is $18,000, so each month Techno would recognize $3,000 ($18,000 / 6). Therefore, on April 31, the revenue recognized would be $3,000, which would be recorded as a credit to the Accounts Receivable account.
However, since the question states that the Accounts Receivable account had a debit balance of $4,000 before the adjusting entry, this means that there were already unpaid customer invoices or debits in the account. After recognizing the revenue of $3,000, the debit balance of $4,000 would still remain, resulting in a debit balance of $7,000 in the Accounts Receivable account after the April 31 monthly adjusting entry.