The X Corporation produces three products with the following costs and selling prices: Product AI B C Selling price per unit Variable cost per unit Direct labor hours required per unit 2.0 3.0 4.0 $30 $40 $40 $16 $20 $24 If X has a limit on direct labor hours available to production ( a constrained resource), then the ranking of the products from the most profitable to the least profitable use of the constrained resource is