Final answer:
The estimate at completion is $240,000 the correct option is d.
Step-by-step explanation:
The estimate at completion is $240,000, which is option d. To calculate the estimate at completion, you need to add the actual costs incurred on the project to the estimate to complete the remaining work. In this case, the estimate at completion is $15 million + $20 million/(1 + 0.15)¹ + $25 million/(1 + 0.15)², which equals $51.3 million. Therefore, the correct answer is d) $240,000.