can someone help me with this managerial accounting practice problem

Required information A company sold a total of 1,000 units for total sales revenue of $60,000, The company incurred total variable expenses of $39,000 and total fixed expenses of $ 14,700. Based on this, the company reported a total contribution margin of $21,000 and net operating income of $ 6,300. Use this information to answer the following questions. Assume that all units are within the relevant range. Calculate the contribution margin ratio. Contribution margin ratio %