cvs - moneymaker idea

Select Secret Deodorants are priced at 2/$4.50. Buy 2 and get $1 ECB. But, here’s how to run this into a moneymaker

Buy 2 Secret Deodorants $4.50 (Total)
Use two $2/1 coupons from the Kmart coupon booklet (found at the kmart pharmacy)
OOP: $0.50 and get a $1 in ECB
Total: FREE + a $0.50 moneymaker after ECB