Ivanhoe Company produces three products, Standard Deluxe and Superior, with the following characteristics: Standard Deluxe Superior Selling price per unit 523 $24 $25 Variable cost per unit 12 21 20 511 Contribution margin per unit 33 55 Machine hours per unit 2 4 1 The company has only 1540 machine hours available each period. If demand exceeds the company's capacity, in what sequence should orders for the three products be filled to maximize the company's total contribution margin? Superior first, Standard second, Deluxe third Standard first, Superior second, Deluxe third Deluxe first, Standard second, Superior third Standard first, Deluxe second, Superior third