Quantity Discount : 24% to 32% off 5+ @ 24% : 3620.31 + 651.66 (18%) = 4271.97 10+ @ 28% : 3429.77 + 617.36 (18%) = 4047.13 15+ @ 32% : 3239.22 + 583.06 (18%) = 3822.28