Sheffield Corp.can sell all the units it can produce of either Plain or Fancy but not both. Plain has a unit contribution margin of $74 and takes two machine hours to make and Fancy has a unit contribution margin of $90 and takes three machine hours to make. There are 3800 machine hours available to manufacture a product. What should Sheffield do? O Make Plain because more units can be made and sold than Fancy. O Make Fancy which creates $21 more profit per unit than Plain does. O Make Plain which creates $7 more profit per machine hour than Fancy does. The same total profits exist regardless of which product is made