Carla Vista Industries manufactures and sells three different models of wet$-$dry shop vacuum cleaners. Although the shop vacs vary in terms of quality and features, all are good sellers. Carla Vista is currently operating at full capacity with limited machine time.

Per unit sales and production information relevant to each model follows.

$\backslash$table$[[,$Product$],[,$Economy,Standard,Deluxe$],[,$$$34,$$$56,$$$112$ What is the contribution margin per unit of limited resource for each product?