Quantity Discount : 24% to 32% off 5+ @ 24% : 4178.71 + 752.17 (18%) = 4930.88 10+ @ 28% : 3958.78 + 712.58 (18%) = 4671.36 15+ @ 32% : 3738.84 + 672.99 (18%) = 4411.83