E5-21 (Algo) Estimating Cost Behavior Using High-Low Method, Preparing Contribution Margin Income Statement [LO 5-3,5-5] Bethany Link delivers parts for several local auto parts stores. She charges clients $3.09 per mile driven. She has determined that if she drives 2,200 miles in a month, her average operating cost is $2.89 per mile. If Bethany drives 4,400 miles in a month, her average operating cost is $1.70 per mile. Required: 1. Using the high-low method, determine Bethany's variable and fixed operating cost components. 2. Complete the contribution margin income statement for the business last month, when Bethany drove 2,420 miles. (Assume this falls within the relevant range of operations)