Quantity Discount : 24% to 32% off 5+ @ 24% : 8430.85 + 1517.55 (18%) = 9948.40 10+ @ 28% : 7987.12 + 1437.68 (18%) = 9424.80 15+ @ 32% : 7543.39 + 1357.81 (18%) = 8901.20