Many of the tools are $1 and use a $1 off coupon it will be FREE just pay tax.
Current Coupons to use:
$1/1 Cover Girl Product, exp 5/31/12 (PG 4/29/12)
This is completely Fine according to Family Dollar Headquarters which can be reached at 866-377-6420 if you have any problems or concerns. Feel Free to call them with any of your coupon questions.
Also it is wise to carry your Family Dollar Coupon Policy which can be found HERE.