Red Cedar Accounting provides two services, Auditing and Taxation, for small firms and nonprofits. Maximum weekly demand for Red Cedar's services is estimated to be 100 units of Auditing and 70 units of Taxation. The following per unit of service data apply: Taxation Audit $18 $20 Contribution margin per unit of service 3 4. Number of labor hours required per unit of service If 496 labor hours are available per week - and all these individuals can do either audit or tax work -- then how many units of Audit and Taxation services should Red Cedar Accounting provide to maximize its operating income