Thumb Score: +20

Amazon [amazon.com] has 1-Oz Differin Acne Spot Treatment with 10% Benzoyl Peroxide for $8.39 – $3 – 40% when you ‘clip’ coupons on product page – 5% when you check out via Subscribe & Save = $1.61.
Shipping is free with Prime or on $35+ orders.

Savings
Apply $3 coupon (check and activate [amazon.com])