We are in the purchase of corner bead, transport costs is a very noteworthy cost, because the level of freight directly determines the level of product prices.
When the purchase number is very small, we are charged by the number of pieces, the freight is very high. But if the amount is very large, you can discuss freight with logistics, we can charge in accordance with the weight, so that more cost-effective.
Now the logistics prices are clear, different cities have different logistics prices, service level is not the same, so we can let manufacturers ask the freight, the general manufacturers provide the price is accurate, of course we need to know in advance.