The marketing manager of Rooney 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 41,200 and 81,300 telephones would be $306,700. Required Assume that Rooney desires to earn a $119,000 profit from the phone sales. How much can Rooney afford to spend on variable cost per unit if production and sales equal 47,300 phones