The marketing manager of TelCo., Inc. has determined that a market exists for a telephone with a sales price of $15 per unit. The production manager suggests that the fixed cost of producing between 20,000 and 40,000 telephones Is $65,00o Assume that Telco desires to earn a $50,000 profit from the phone sales. How much can TelCo afford to spend on variable cost per unit If production and sales equal 30,000 phones? O $21.17 $28.67 O $18.67