Hi I am useing two dift shipping one up to 50lbs which is the usps and another which is by weight or per unit. The prob I am having is that when I have a product that weighs under 50 lbs it show both in the check out. Is their a way to show only usps for anything under 50lbs and only per unit for anything over 50lbs. what is happing is the product under 50lbs is showing a cheaper per unit price then the usps price put it will cost me mor to truck ship then to ship usps