a. What is Green Rider's break-even point in units and sales dollars? b. If the company has an after-tax income goal of $1 billion and the tax rate is 50 percent, how many units of each type of scooter must be sold for the 8 c. Assume the sales mix shifts to 50 percent Mod, 40 percent Rad, and 10 percent X-treme. How does this change affect your answer to (a)? Note: Do not round until you determine the number of units of each product; round number of units to the next highest whole unit in your calculations