What is the best estimate to use for forecast?

The correct answer to this question is A, $45,600. This answer corresponds with the amount labeled ETC in the question. Related to project management, ETC stands for an estimate to complete. It is a technique of forecasting for a project. ETC is used to estimate how long it will take for a project to be completed.

They are essential estimates because they help the project manager have a timeline for reaching their goal of completion, as well as giving them an idea of how much money is needed to complete the project, based off the said timeline. In this question, the sponsor wants to know how much money is required to spend on the project, making ETC the best answer.