Russell Preston delivers parts for several local auto parts stores. He charges clients $0.75 per mile driven. Russell has determined that If he drives 3,210 miles in a month, his average operating cost is $0.55 per mile. If he drives 4,280 miles in a month, his average operating cost is $0.50 per mile. Russell has used the high-low method to determine that his monthly cost equation is total cost = $642 + $0.35 per mile. Required: 1. Determine how many miles Russell needs to drive to break even. 2. Assume Russell drove 1,905 miles last month. Without making any additional calculations, determine whether he earned a profit or a loss last month. 3. Determine how many miles Russell must drive to earn $1,000 in profit. 4. a. Prepare a contribution margin income statement assuming Russell drove 1,905 miles last month. b. Use the information provided in Req 4a to calculate Russell's degree of operating leverage. Complete this question by entering your answers in the tabs below. Req 1 Req 2 Req 3 Req 4A Req 4B Determine how many miles Russell needs to drive to break even. Note: Do not round your intermediate calculations. Break-Even Miles Miles