If you have a $5 rewards coupon, you may use it just like a $5 bill.
The $5 will come off your total purchase, regardless of how many items.
You cannot get $$ back if you do not use it all, though.
So to get the full value, your total purchase must be at least $5.
However, be sure to use it before the exp date!!
Once that date goes, the cpn is useless.