Walgreens Stores: 50-Oz Purex Liquid Laundry Detergent (Various) $0.98, More

How to get it:
1. To clip coupon:
Sign into your Balance Rewards Membership (or register, free to join)
Visit the Walgreens Weekly Ad. On page one (near center of image) 'clip to card' the $1 Purex Coupon while logged in. You will then see it reflected on your clipped coupons page here (select 'clipped' coupons). Check FAQ for "How to use paperless coupons" at upper right of screen.
2. Present Balance Rewards Card or Membership Information at checkout to redeem
3. The price after coupon should be $0.98
Coupon may be limited to one per account
Valid in store only

Some examples after $1 off coupon (links for reference):

50oz Purex Liquid Laundry Detergent (Mountain Breeze) $0.98
50oz Purex Natural Elements Liquid Laundry Detergent (Linen & Lilies) $0.98
50oz Purex Liquid Laundry Detergent (Free & Clear) $0.98
More ...