波兰采购需求：黑色钢板、金属板、碳钢板、碳钢板、碳钢板、金属板

We're gearing up for a significant bulk purchase and would love to explore the wholesale pricing options available. It would be great to get a detailed breakdown of the price gradients you offer based on different order volumes. Understanding how the pricing changes with quantity will help us make an informed decision. Additionally, could you share the various payment methods you accept? Knowing the options available is crucial for us to streamline our purchasing process. A timely reply would be appreciated, as we're looking to finalize our order soon. Thanks a lot!