Quantity Discount : 28.60% to 36.12% off 5+ @ 28.60% : 102.25 + 18.41 (18%) = 120.66 10+ @ 32.36% : 96.87 + 17.44 (18%) = 114.31 15+ @ 36.12% : 91.49 + 16.47 (18%) = 107.96