Weight can save money
As mention earlier, the heavier the product, the higher the transport rate, or vice versa. If your products are somewhat heavy, such as steel coils, fertilizers, chemicals etc, make sure you inquire the transportation rate based on weight or normally referred as tonnage. It normally comes with cheaper rate compares to the rate by loose package. If you can palletize your products (normally 1-ton per pallet), the rate is even more cheaper.