Nature Valley Register Reward!

I found this hidden Register Reward for Nature Valley on the back of a catalina!  Here's how it works:

Get $1 Register Reward wyb 3 boxes Nature Valley Granola Bars
Get $2 Register Reward wyb 4 boxes
Get $3 Register Reward wyb 5 boxes

Buy 4 boxes Nature Valley Granola Bars 2/$4 = $8
Use  .60/1 printable coupons
or
Use .75/2 coupon GM 9/11
AND
Use $1/2 coupon Walgreens October Coupon Book
Get $2 Register Reward
Final Price:  as low as .40 per box!