Shipping Based on DB column

I have a database containing a table for products. One of the fields is the shipping charge for the specific item. How can I add up all the shipping charges based on a given item and its corresponding shipping charge and quantity?

I am using eCart 5.0.4 PHP/MySQL

in the eCart object, add a column for itemShipping. on the calculations tab add a new calculation as:

TotalShipping
[itemShipping] * [Quantity]

on the shipping tab, create a new shipping rule using the following trigger:
"Total number of Unique Items In the cart"
if the total number Of unique items in the cart is ">" a value of "0"

and set the calculation to:
"Based on multiple of column subtotal"
Subtotal of column "TotalPrice" "Times" "1" "Plus" "0"

in the add to cart button behavior, bind the itemShipping cart column to the shipping column in your products table.

Thanks Jason. How about adding an additional charge when there is more than one item in the cart (unique or multiple of the same item)? I want to do the following:

$7.95 shipping for the first item, additional $3 charge (one-time) if more than one item is ordered (same item or different items).

2 new shipping rules:

base:
Subtotal for any column:
If the subtotal of column "Quantity" is ">=" a value of "1"

Calculation:
Flat rate charge of 7.95


2 items or more:
Subtotal for any column:
If the subtotal of column "Quantity" is ">=" a value of "2"

Calculation:
Flat rate charge of 3

Thanks Jason!