Amazon [amazon.com] has 84-Oz Tide Liquid Laundry Detergent (Free & Gentle, 64 Loads) 4 for $49.12 - 33% (multibuy discount) - 5% when you check out via Subscribe & Save = $30.47.
Shipping is free with Prime or on $35+ orders.

Click here [amazon.com] and adjust qty to 4

Price
$21.49 lower (41% savings) than the list price of $51.96
$21.29 lower (41% savings) than the previous price of $51.76

Savings
Save 33% on 4 when you buy 4 (check and activate [amazon.com])

Subscribe & Save
5%: $30.47
15%: $25.55
Add 4 to next delivery [amazon.com] (with free shipping)
fillers [amazon.com]

Customer reviews
4.8⭐ / 33,917
40,000+ bought in past month

amazon.com/dp/B085V5ZMV9 [amazon.com]

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