Quantity Discount : 24% to 32% off 5+ @ 24% : 5760.54 + 1036.90 (18%) = 6797.44 10+ @ 28% : 5457.36 + 982.32 (18%) = 6439.68 15+ @ 32% : 5154.17 + 927.75 (18%) = 6081.92