How much does the card cost?     What is the validity of the card?     How much J$ can I redeem per visit?     What happens to my J$ when my card expires?     Can I use multiple Jumbo Rewards Cards to redeem/earn J$?     How do I check my J$ balance?   When you sign up for the Jumbo Rewards Card, you will be given a user ID and password. You may check your J$ online with your user ID and password. What if I lost my card? Will I lose my J$ also?     How do I sign up?