The system determines the weight by adding the total weight of all products in the order and prorates this amount for each line based on the weight of the individual product.
To define shipping charges by weight:
1. On
the Shipping Charges Maintenance
screen, from the Define Shipping Charges task category, click Simple
by Weight, as highlighted below.

The Shipping Charges Maintenance – Simple by Weight screen displays, as
shown below.

2. Click Add.
3. Select
the effective Begin Date for the
shipping charges from the drop-down.
This shipping method will be charged if the order date is on or after the
begin date.
4. In
the Base Ship Amount field, enter
the minimum shipping amount that will be charged regardless of product
weight per order per ship-via.
For example, if an order has three line items, two being shipped via FedEx
and one being shipped via UPS, then the Base Ship Amount defined for the
FedEx will be split between the two lines, AND the Base Ship Amount for
UPS will be applied to the third line.
5. In the Amount Charged per Unit Weight field, enter the amount of money charged to every order per unit weight.
6. Select
the effective End Date for the
shipping charges defined from the drop-down.
This shipping method will be charged if the order date is before the End
Date.
7. Click Save.