Pepsi 12 packs 5/$15 Get $5 back when you buy $15 in Pepsi products
Submit for Pepsi rebate
Pay $2 each after coupons and get more coupon savings after rebate
Update 1/13:
Apparently a register reward is printing for $5 if you buy $15 in Pepsi/Frito Lay products or $10 if you buy $20 in products.

These are the qualifying products:
12 pk or 2 ltr: Pepsi, Mountain Dew, Sierra Mist32 oz. Gatorade, G2 or Tiger9 - 13 1/2 oz Tostitos Tortilla Chips11 3/4 - 13 oz Doritos (all varieties)16 oz Tostitos Queso Dip
Besides the 12 packs and the litter bottles, the Doritos and the Tostitos chips and dips are also part of the Pepsi rebate.

The 12 packs are on sale $3 each and the Tostitos chips and queso dips are on Megasaver* 2/$7 if you buy two or $3.99 for one.

If you want to do the rebate you could buy:
$12 for four twelve packs
$10.5 for three bags of tortilla chips-
Use 4 of these $1/1 internet printable coupon if you are buying Pepsi One
=$ 18.50 out of pocket and get $10 in RR back and submit your receipt for the Pepsi Rebate. Would make for cheap Super Bowl snacks - Thanks mercedes.