Quantity Discount : 24% to 32% off 5+ @ 24% : 12150.98 + 2187.18 (18%) = 14338.16 10+ @ 28% : 11511.46 + 2072.06 (18%) = 13583.52 15+ @ 32% : 10871.93 + 1956.95 (18%) = 12828.88