Gap, Banana Republic, Old Navy Coupons

I'm not sure which coupon codes you can combine and which you can't but here they are!

SHIP4FREE - Free Shipping on $100 - Expires 07/07/08

EXTRA20 - 20% off at Old Navy - Expires 07/10/08

GAPSALE25 - Take an extra 25% off Sale items - Expires 07/06/08