1) Sign into
www.ae.com and add your items to cart. (Make sure you are using a desktop version- not the mobile site). Goto checkout and add code 52354051 for 15% off.
2) Log onto m.ae.com and make sure you are using the mobile version. Add code 09L27551 to checkout for another 40% off.
I don't think shoprunner will work and paypal is used to pay, it might give you errors.
You could try signing back into the desktop version to use shoprunner but it might stop the codes from being stacked.
Also if your birthday is this month and have an american eagle rewards card you might be able to get an additional 15% off. Post in comments if the additional 15% off works from the rewards card. Also any comments about using shoprunner should be posted. Enjoy