Quantity Discount : 24% to 32% off 5+ @ 24% : 8372.88 + 1507.12 (18%) = 9880 10+ @ 28% : 7932.20 + 1427.80 (18%) = 9360 15+ @ 32% : 7491.53 + 1348.48 (18%) = 8840.01