Quantity Discount : 24% to 32% off 5+ @ 24% : 3821.90 + 687.94 (18%) = 4509.84 10+ @ 28% : 3620.75 + 651.74 (18%) = 4272.49 15+ @ 32% : 3419.59 + 615.53 (18%) = 4035.12