Thumb Score: +13

Amazon [amazon.com] has 10-ml Systane Balance Lubricant Eye Drops for $13.84 – 40% when you ‘clip’ the coupon on product page – 5% when you check out via Subscribe & Save = $7.61.
Shipping is free with Prime or on $35+ orders.

Savings
40% off coupon applied. Subscribe & Save orders only. (check and activate [amazon.com])