Quantity Discount : 28.75% to 36.25% off 5+ @ 28.75% : 1479.34 + 266.28 (18%) = 1745.62 10+ @ 32.50% : 1401.48 + 252.27 (18%) = 1653.75 15+ @ 36.25% : 1323.62 + 238.25 (18%) = 1561.87