This is a great example of how combining sales prices with coupons and other promotions can save you money. This deal will even work for anyone who is brand new to couponing even if they haven't clipped a coupon yet. It only requires a printer to gather a few printable coupons.

Buy (4) boxes of Kellogg's Cereal on-sale for $1.88 each
(Frosted Flakes, Apple Jacks, Fruit Loops, Corn Pops, Cocoa Krispies or Honey Smacks 10 oz)
Use (2) 1.50 off 2 coupons from HERE (coupons.com)

Pay $4.52 plus tax Out of Pocket and receive a $3 Catalina ($3 toward your next purchase. You can do the first transaction again if you printed enough coupons (may require 2 computers) or you can try this transaction.

You can also find $1 off 3 coupons at coupons.com
Buy (6) boxes of Kellogg's Cereal
Use (2) $1 off 3 from HERE or (3) $1.50 off 2
Use (2) Double coupons - Double coupons can be used with the $1 coupons only.
Use the $3 catalina from the first purchase
Pay $4.28 plus tax and receive a $4 catalina toward your next purchase

This makes the price per box less than 48 cents each after you factor in the catalina.

Thanks Fabulessly Frugal for match up ideas