Quantity Discount : 24% to 32% off 5+ @ 24% : 1406.65 + 253.20 (18%) = 1659.85 10+ @ 28% : 1332.61 + 239.87 (18%) = 1572.48 15+ @ 32% : 1258.58 + 226.54 (18%) = 1485.12