If sales are $820,000, variable costs are 68% of sales, and operating income is $260,000, what is the contribution margin ratio? a. 53% b. 32% c. 47% d. 38%

If sales are $820,000, variable costs are 68% of sales, and operating income is $260,000, what is the contribution margin ratio?
                a.            53%      
                b.            32%      
                c.             47%      
                d.            38%
Answer
32%