Sunday Coupon Stacking

Spent today taking another newbie on their first shopping trip. My sister drove up from St Louis to find out how to make the most out of her budget and we had a great time!
This is just a sample of the savings for today.

Walgreens Shop 1-4 Summary: 
Amount Spent: $158.21
Amount Saved: $201.83
Register Rewards: $75.00
Final Cost: $82.21

My sister found on her first time out that she saved on average 66% on total money spent. Here is her summary:

Totals
$237.35	:  Retail Dollars
$107.72	:  Total Dollars Spent
$129.63	:  Total Dollars Saved
66%	Average % saving

Cheat will be arriving with Tuesdays coupons to save even more! Now if it would stop raining...