Wow! I think you need to take me shopping and give me some pointers.
You would do a whole lot better with my sister lol, she's coupon mary on youtube. I did buy about $150 worth of items last yr for the Christmas season and only paid $4.50! Everyone in the check out line looked at me as if I was a goddess, lol, I almost expected a round of applause, lol. This year, I kept going back to both CVS stores in my town getting the Pot of Gold boxes of candy. The coupon machine in CVS kept spitting out $3 coupons off 2 boxes, and I had a bunch of $1 off coupons per box. So I was getting 2 boxes for $5 off. You're allowed to use a manufactured coupon along with a CVS coupon. That's how I was getting 2 boxes for $2.98. Needless to say, everyone I know got boxes of candy as one of their presents. I still have about 10 boxes on hand lol.
A couple of weeks ago they were offering Centrum Nutrium vitamins for 9.99 each. I missed it because they were sold out before I ever got a chance. Well during the holiday season CVS was giving out $10 gift card for buying $30 of select products, The vitamins were among them. So people would buy 3 of the bottles. Then the coupon machine was giving $5 off coupons, and there were manufactured coupons for $7 off, and there were some for $5 off. So depending on which coupon you used, you got $10-12 off the 9.99 vitamins. Buy 3, get a $10 gift card. So some people were just paying tax but some cashiers just zeroed out the customers balance.