Quantity Discount : 28.75% to 36.25% off 5+ @ 28.75% : 1177.44 + 211.94 (18%) = 1389.38 10+ @ 32.50% : 1115.47 + 200.78 (18%) = 1316.25 15+ @ 36.25% : 1053.50 + 189.63 (18%) = 1243.13