Jake Company produces and sells vases and lamps. Revenue and cost information for the two products from last month appear below: selling price per unit .... variable costs per unit... Vases $15.80 $ 5.20 Lamps $14.60 $ 9.70 For the coming month, Jake would like to use linear programming in order to maximize monthly profits. Each month Jake has 60,000 direct labor hours available and 72,000 machine hours available. Each vase requires 8 direct labor hours and 4 machine hours. Each lamp requires 6 direct labor hours and 10 machine hours. Calculate the maximum amount of contribution margin Jake Company can earn in the coming month.