New UPS Shipping Discounts

I was looking at the actual charges for Coffee Shrub orders and it looks like I can offer further discounts. The way our UPS contract is structured, with incentive pricing, delivery area surcharges, fuel surcharges, etc etc, it is hard to figure out up front what it will cost to ship a package. It is a lot more like buying a new car than you would think - which is crazy! But I am wading through the details, will be refunding customers on orders where we overcharged folks, and building the shipping calculator so it returns better pricing. Maria