30% + $10 off $50 at Sherwin Williams ACs (Emerald for $42.50/gal)

Sherwin Williams has one of their usual (for Winter) 30% off coupons valid until 02/29/20, and a stackable $10 off $50 coupon valid until 03/31/20.
I was able to get a single gallon of matte Emerald paint normally priced $75 for $42.50… roughly 44% off, beating their best 40% off coupon that comes around a few times a year.
https://www.sherwin-williams.com/…ve%20Today
Link to 30% off coupon above. I’ve attached the $10 off $50 coupon.