Sue sells authentic Amish quilts on her website. Suppose Sue expects to sell 1,400 quilts during the coming year. Her average sales price per quilt is $300, and her average cost per quilt is $100. Her fixed expenses total $210,000. Compute her margin of safety a. in units (quilts). b. in sales dollars. c. as a percentage of expected sales. a. Compute her margin of safety in units (quilts). Begin by determining the formula, then compute the margin of safety in units (quits). Margin of safety in units