i cant find out net operating income (it says 868 is wrong ) please help :)

Bethany Liang delivers parts for several local auto parts stores. She charges clients $1.48 per mile diven, She has determined that if she drives 1,300 miles in a month, her average operating cost is 51.28 per mile if Bethany drives 2.600 miles in a month, hes average operating cost is 50.80 per mile. Required: 1. Using the high-low method, determine Bethany's variable and fixed operating cost components 2. Complete the contribution margin income staternent for the business last month, when]Bethany drove 1.430 miles. (Assume this falls within the relevant range of operations). 8 Answer is complete but not entirely correct. Complete this question by entering your answers in the tobs below. Complete the contribution margin income statement for the business last month, when Bothany drove 1,430 miles. (Assume this falls within the relevant range of operations). this talis within the relevant range of operations). fote: Round your intermediate calculations to 2 decimal places and finat answers to the nearest whole number