Walgreen's Robitussin Money Maker

UPDATED 9/8: Proceed with caution! I stopped at Walgreen's today to give this deal a try. The Register Rewards did not print. The manager ended up returning the items, ringing the items again without using the coupons and the Register Rewards printed. The lady behind me had the same problem (she used the same coupons). The cashier ended up telling the manager that we were paying less than $4 for the $10 Register Rewards so he will NOT be issuing Register Rewards for this deal any longer.

Buy participating products,receive Register Rewards at checkout* Good on your NEXT in-store purchase

Buy 2, Get $5 • Buy 3, Get $10

*Participating Products*
Advil PM - $6.99
Advil Liqui-gels - $6.99
Advil tablets - $6.99
Dimetapp - $3.99
Robitussin - $3.99
Centrum Silver - $6.99
Centrum - $6.99

Deal:
Buy 3 Robitussin - $3.99 each
Use 3 $3/1 coupon here
Spend $2.97 plus tax oop and get $10 in Register Rewards! This is almost a $7 MONEY MAKER!!

I found this deal on SlickDeals.