Sarah sells authentic Amish quilts on her website. Suppose Sarah expects to sell $1,800$ quilts during the coming year. Her average sales price per quilt is $$350,$ and her average cost per quilt is $$150.$ Her fixed expenses total $$135,000.$ 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 $($quilts$).$

$=$ Margin $of$ safety $in$ units