Quantity Discount : 28.74% to 36.24% off 5+ @ 28.74% : 62.20 + 11.20 (18%) = 73.40 10+ @ 32.50% : 58.92 + 10.61 (18%) = 69.53 15+ @ 36.24% : 55.65 + 10.02 (18%) = 65.67