The Rosa model of Mohave Corporation is currently manufactured as a very plain umbrella with no decoration. The company is considering changing this product to a much more decorative model by adding a silk-screened design and embellishments. A summary of the expected costs and revenues for Mohaves two options follows: Rosa Umbrella Decorated Umbrella Estimated demand 10,000 units 10,000 units Estimated sales price $ 8.00 $ 19.00 Estimated manufacturing cost per unit Direct materials $ 2.50 $ 5.50 Direct labor 1.50 4.00 Variable manufacturing overhead 0.50 2.50 Fixed manufacturing overhead 2.00 2.00 Unit manufacturing cost $ 6.50 $ 14.00 Additional development cost $ 10,000 Required: 1. Determine the increase or