Help Save & Exit Submit 1 Check my work Derby Phones is considering the introduction of a new model of headphones with the following price and cost characteristics. $ 10 points Sales price Variable conta Fixed coats 190 per unit 85 per unit 241.500 per month Print Required: a. What number must Derby sell per month to break even? b. What number must Derby sell to make an operating profit of $136,500 for the month? a Break even sales in units b. Number of units to be sold