Note on Robitussin Moneymaker this Week at Walgreens

This is the big moneymaker at Walgreens this week:

Buy 3 Robitussin at $3.99 each
Use 3 $3/1 printable coupon Coupon is now 1/1 (updated 9/11)
Spend $2.97 plus tax out of pocket and get $10 in Register Rewards Back
Free plus approx. $7 in overage after coupon and Register Reward

However, not all types of Robitussin are working. here are the ones reported working and not working:
DM sugar free for diabetics
Robitussin Night Time Cough,Cold and Flu
Robitussin night time & Children’s Dimetapp DM
Children’s Dimetapp (cold & cough and cold & allergy)

NOT working:

Robitussin DM Max
Head and Chest Congestion PE

Thank you HCW