Quantity Discount : 28.75% to 36.25% off 5+ @ 28.75% : 1449.15 + 260.85 (18%) = 1710 10+ @ 32.50% : 1372.88 + 247.12 (18%) = 1620 15+ @ 36.25% : 1296.61 + 233.39 (18%) = 1530