Susy sells authentic Amish quilts on her website. Suppose Susy expects to sell 1,600 quilts during the coming year. Her average sales price per quilt is $325, and her average cost per quilt is $125. Her fixed expenses total $160,000. Compute Susy's operating leverage factor at an expected sales level of 1,600 quilts. If sales volume increases 4%, by what percentage will her operating income change? Prove your answer by calculating operating income at a sales volume of 1,600 and at a sales volume of 1,664 . Compute her operating leverage factor. (Round your answer to two decimal places.) First, identify the formula, then compute the operating leverage factor