Amazon has the 90-Count Presto! Triple Action Dishwasher Pacs (Lemon Scent or Fresh Scent) on sale for $15 - 15% off coupon (check "Save an extra" box, eligible on first S&S order for this product) - 5% off with Subscribe & Save (can cancel anytime) = $12 with free shipping on $35+ or with Prime. Roughly 13 cents per wash.