The marketing manager of Perez Corporation has determined that a market exists for a telephone with a sales price of $20 per unit. The production manager estimates the annual fixed costs of producing between 41,600 and 80,500 telephones would be $199,600. Required Assume that Perez desires to earn a $128,000 profit from the phone sales. How much can Perez afford to spend on variable cost per unit if production and sales equal 46,800 phones? Variable cost per unit