From now until November 15th, for every $20 you spend at Old Navy in stores, you will receive $10 Super C-A-S-H. Then between November 17th and 22nd, you can redeem the Super C-A-S-H, $10 for every $20 you spend.
*You can only receive $30 Super C-A-S-H per transaction.
Visit their site for more information.