In September, Sandhill industries sold 820 units of product. The average sales price was $40. During the month, fixed costs were $7,308 and variable costs were 70% of sales: (a) Determine the contribution margin in dollars, per unit, and as a ratio, (Round Contribution margin to 0 decimal places, es. 5.275. Other all answers to 2 declmal places, ez 52.75