Quantity Discount : 24% to 32% off 5+ @ 24% : 3636.41 + 654.55 (18%) = 4290.96 10+ @ 28% : 3445.02 + 620.10 (18%) = 4065.12 15+ @ 32% : 3253.63 + 585.65 (18%) = 3839.28