Ace, Inc. has the following cost data for Product X, and unit product cost using variable costing when production is 400 units, 800 units, and 1,600 units. Product X sells for $151 per unit. Assume no beginning inventories. Calculate the contribution margin using variable costing when Ace: a. Produces and sells 400 units. b. Produces 800 units and sells 400 units. c. Produces 1,600 units and sells 400 units. Begin by selecting the labels and computing the gross profit for scenario a. and then compute the gross profit for scenario b. and c