VI. Mapagbigay Corporation grants all its employees (rank and file, supervisors, and managers) 5% discount of the purchase price of its products. During an audit investigation, the BIR assessed the company the corresponding tax on the amount equivalent to the courtesy discount received by all the employees, contending that the courtesy discount is considered as additional compensation for the rank and file employees and additional fringe benefit for the supervisors and managers. In its defense, the company argues that the discount given to the rank and file employees is a de minimis benefit and not subject to tax. As to its managerial employees, it contends that the discount is nothing more than a privilege and its availment is restricted. Is the BIR assessment correct? Explain. (5%)