Custom Shipping rules
I want to have shipping rules based on the product category of items, such as a flat fee for items in Category 1, a USPS rate for items in Category 2, a UPS rate for items in Category 3 and a rate calculated with my own formula for a mixture of categories.
(The nature of my business is my orders are rarely mixed categories.)
I am using DW CS4, eCart 5, and PHP.
What would the code look like and where would I put it?