Spent $7.79 but received $8 back for my next order, $.21 moneymaker!

I ran to Meijer today to see if I could come up with a good deal for the Betty Crocker, Nature Valley and General Mills Promo. Here's the promotion, if you spend $10 on any of the above brands you are suppose to receive a $3 catalina coupon back good on your next order. If you spend $20 you are to receive $8 back on your next order. I purchased all of the above for $7.79 and I received a catalina coupon back for $8 on my next order. So in the end I made $.21 on the above!!

Here's what I bought and the coupons I used!

4 Betty Crocker Cake Mixes $.99 each

5 Betty Crocker Frostings $1.29 each -used (2) $.75/2 from 3/28 ss, used (2) $.50/2 from here, used (1) $.40 frosting coupon from here, and used (3) $1 Meijer Mealbox Coupons from here.
2 Bisquick Mixes $1.99 each -used $.60 from http://www.smartsource.com/ and used (1) $.50 coupon from 3/28 ss
2 Betty Crocker Blueberry Muffin Mix $1.67 each -used (2) $.50 coupons from 3/28 ss
2 Betty Crocker Brownies $1.67 each -used (2) $.40 coupons from here
2 Green Works Toilet Bowl Cleaner $2.14 each -used (2) $.50 coupons from 4/11 ss and (1) $1 Meijer coupon from here. In addition if you purchase 2 Green Works items you'll receive $2 off instantly!

I paid $7.79 and saved $28.50!!! In addition, I received the $8 catalina that I spend on my essentials on my 2nd transaction!

If you don't see some of the coupons at Coupons.com, check out the Betty Crocker link at the top right side of the page, they typically will also carry pretty good Betty Crocker coupons!