What do you mean by Freight $/Unit and $/Unit?
Edited
Prime Freight Freight $/unit is the cost per unit of just transporting the freight from the port of origin to the port of destination.
The total cost of shipping per unit is $/unit. $/unit includes the cost of shipping the cargo from port to port, as well as the origin, destination and other charges applicable at the time of quotation.
LCL (less than container load) deliveries are determined by CBM, so you will see Freight $/CBM and $/CBM on the quotation request.
Air and FCL (full container load) deliveries are determined by kilogram, so you can see Freight $/KG and $/KG on your quotation request.