Amazon has the 112-count Gain Flings Laundry Detergent Pacs (Super Fresh Blast) on sale for $18 - 5% off with Subscribe & Save (can cancel anytime) = $17 with free shipping on $25+ or with Prime. Roughly 15 cents per laundry load. 

• Want to buy in bulk? Add 4 to cart for $72 - 5% S&S - $10 off multiby promo = $58 ($14.56 each or 13 cents per load)