Stores that say they double to a dollar will not exceed a dollar amount. If the stores says it will double up to .99 cents. It means you could get as much as 1.98$ if you have a .99cent or free whichever is less . This is Giant's policy. They also only double one like coupon. So if you have two boxes of cereal and a coupon for each one. They will only double one . You will get face value for the other one. I hope that answered your question.