From now until August 18th, for every $20 you spend at Old Navy, you will receive $10 Super C-A-S-H. Then between August 25-29th, you can redeem the Super C-A-S-H, $10 for every $20 you spend.
*You can only receive $50 Super C-A-S-H per transaction. Not available on gift cards.
Visit their site for more information.