Exercise 6-15 (Part Level Submission) Casas Modernas of Juarez, Mexico, is contemplating a major change in its cost structure. Currently, all of its drafting work is performed by skilled draftsmen. Rafael Jiminez Casas' owner, is considering replacing the draftsmen with a computerized drafting system. However, before making the change, Rafael would like to know the consequences of the change, since the volume of business varies significantly from year to year. Shown below are CVP income statements for each alternative Manual System Computerized System Sales Variable costs Contribution margin Fixed costs Net income $1,560,000 1,248,000 312,000 72,000 $240,000 $1,560,000 624,000 936,000 696,000 $240,000