Quantity Discount : 28.75% to 36.25% off 5+ @ 28.75% : 996.29 + 179.33 (18%) = 1175.62 10+ @ 32.50% : 943.86 + 169.89 (18%) = 1113.75 15+ @ 36.25% : 891.42 + 160.46 (18%) = 1051.88