Quantity Discount : 24% to 32% off 5+ @ 24% : 3953.93 + 711.71 (18%) = 4665.64 10+ @ 28% : 3745.83 + 674.25 (18%) = 4420.08 15+ @ 32% : 3537.73 + 636.79 (18%) = 4174.52