can someone explain this one with details? how do you get 209 while solving?

Create a New Study Question 10 1/1 pts Wood Carving 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 Elvis Statues Candle Holders Selling price $30 $ 80 $ 42 Variable cost $20 $ 40 $20 Labor hours required 11 6 2 Assume that Wood Carving only has 1,800 labor hours available next month. Also assume that Wood Carving can only sell 800 units of each product in a given month: Hints: (800 units of each product is the demand) (Labor hours is the resource constraint). What is the maximum total amount of contribution margin that Wood Carving can generate next month given this labor hour shortage? $19,800 $19.000 Correct! $19,600 $12.000