Problem 11-1 Calculating Costs and Break-Even [LO3] Night Shades, Incorporated, manufactures biotech sunglasses. The variable materials cost is $18.60 per unit, and the variable labor cost is $7.40 per unit. a. What is the varlable cost per unit? (Do not round intermediate calculations and round your answer to 2 decimal places, e.g., 32.16.) b. Suppose the company incurs fixed costs of $880,000 during a year in which total production is 390.000 units. What are the total costs for the year? (Do not round intermediate calculations and round your answer to the nearest whole number, e.g., 32.) . c. If the selling price is $50.00 per unit, what is the cash break even point? If depreciation is $680,000 per year, what is the accounting break-even point? (Do not round intermediote colculations and round your answers to 2 decimal places, e.g. 32.16.)