Thumb Score: +23

Amazon [amazon.com] has 42-Count Persil Ultra Pacs Original Everyday Clean Laundry Detergent for $10.39 – 15% when you ‘clip’ the coupon on product page – 5% when you check out via Subscribe & Save = $8.31.
Shipping is free with Prime or on $35+ orders.

Price
$4.66 lower (36% savings) than the typical price of $12.97