Happy Corporation manufactures three products. Because of a recent lack of skilled wood carvers, the corporation has had a shortage of available labor hours. The following per unit data relates to the three products of the corporation: Letter Openers Eagles Doves Ducks Selling price $30. $80 ..$42 Variable cost $20. $40 $20 Labor hours required.. 1. 6 .2 Assume that the Happy Corporation only has 1,800 labor hours available next month. Also assume that the Happy Corporation can only sell 800 units of each product in a given month. What is the maximum amount of contribution margin that the Happy Corporation can generate next month given this labor hour shortage