美国采购需求：铝装饰型材、建筑铝饰条、铝型材供应商、建筑定制铝型材、建筑金属型材、铝幕墙系统

I'm interested in understanding how your pricing structure works for wholesale orders. Could you provide details on the factors that influence your wholesale prices? Are there specific volume thresholds or product categories that affect the pricing? Additionally, I'm curious if there are any upcoming promotions or discounts that might apply to bulk purchases. This info would be really helpful as I plan our purchasing strategy moving forward. Thanks!