E6-9 (Algo) Analyzing Break-Even Point, Preparing CVP Graph, Calculating Degree of Operating Leverage, Predicting Effect of Price Structure Changes [LO 6-1, 6-4, 6-5] Joyce Murphy runs a courier service in downtown Seattle. She charges clients $0.59 per mile driven. Joyce has determined that if she drives 2,800 miles in a month, her total operating cost is $792. If she drives 5,800 miles in a month, her total operating cost is $1,212. Joyce has used the high-low method to determine that her monthly cost equation is total monthly cost = $400 + $0.14 per mile driven. Required: 1. Determine how many miles Joyce needs to drive to break even. 2. Calculate Joyces degree of operating leverage if she drives 6,000 miles. 3. Suppose Joyce took a week off and her sales for the month decreased by 27 percent. Using the degree of operating leverage, calculate the effect this will have on her profit for that month.