Final answer:
The adjusted service revenue balance after adding the newly billed amount of $4,570 to the unadjusted balance of $11,200 is $15,770, making the correct answer D) $15,770.
Step-by-step explanation:
When customers are billed for work completed, this amount should be accounted for in the company's financial records. The question provided indicates that work was completed and billed at a value of $4,570. Given that the service revenue unadjusted balance as of December 31 is $11,200, we must add the newly billed amount to this unadjusted balance to find the adjusted service revenue balance. To calculate the adjusted balance, we add the $4,570 to the unadjusted balance of $11,200. Therefore, the adjusted service revenue balance after accounting for the billed amount is:
$11,200 + $4,570 = $15,770.
The correct answer to the question 'What is the adjusted service revenue balance after accounting for the billed amount?' is D) $15,770.