20 4. Wood Carving Co. makes 3 products with these costs and selling prices: Letter Openers Selling price per unit Elvis Statues Candle Holders $30 $80 $42 Variable costs per unit 20 Fixed costs per unit Labor hours per unit I Assume Wood Carving only has 1,800 labor hours available next month and no limit on units sold, then the ranking of the products from the most profitable to the least profitable use of the constrnined resource is: (show your work below and the contribution margin per hour) am per hour $ 40 8 6 2. cm per hour $ 3. cm per hour $