Weaver Company makes small custom area rugs that incorporate the image of your pet. Each rug requires $10.00 in DM and $10.00 in DL. Weaver has to pay $4,800 in rent for the facility per month. Each rug sells for $30.00.

If the relevant tax rate is 20%, how many rugs does Weaver need to produce and sell each month to achieve an after-tax profit of $7,000? Given your pervious answer, calculate the margin of safety in dollars.