Prime members only. Ends 10/9. Amazon has the 44-Count Arm & Hammer Deep Clean Laundry Detergent Power Paks (Stain Formula) for $10.18 - $2.39 off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $8.99 with free shipping. Roughly 20 cents per wash.