Final answer:
To assess the project's viability, consider the total economic profit by adjusting the earnings forecast with relevant costs, not just accounting earnings, including $7 million of working capital and subtracting implicit expenses such as overhead.
Step-by-step explanation:
When evaluating the consultant's report on Northern Fibre's expansion project, it is crucial to consider not only the accounting earnings but also the true economic profit of the project. The analysis should consider the upfront $7 million working capital, recoverable at the end of the project, and only the portion of selling, general, and administrative expenses directly attributable to the project ($1.12 million being fixed overhead costs).
To arrive at the true economic profit, you need to adjust the earnings forecast by subtracting both explicit and implicit costs: the total revenues minus the explicit costs (that is directly related to the project) and the implicit costs (like the overhead costs that will occur regardless of the project's acceptance). This will offer a clearer picture of the project's viability.