Before I went to walmart, I looked online and found their coupon policy. Turns out, if the amount of the coupon exceeds the value of the product, you get that amount back in cash. *so excited!*
So I went and relieved them of 18 boxes of ziploc bags (all they had), and ended up with $6.16 back in cash!

I'm going to go back on Wednesday and Thursday and hopefully get more :)

Click the pictures to embiggen :)