n September, Crane Industries sold 850 units of product. The average sales price was $50. During the month, fixed costs were $8,700 and variable costs were 70% of sales. (a) Determine the contribution marginin dollarsker unit, and as a ratio, (Round Contribution margin to 0 decimol ploces, es 5,275 , Other all answers to 2 decimal places, eg. 52.75.) Contribution margin (in dollars) $ Unit contribution margin Contribution margin ratlo Using the contribution margin technique, compute break-even salesdollars and sales units. Break-even sales (in dollars) Break-even sales (in units) units