Using v1.3.9e ZenCart
http://www.waterweedmat.com

I would like to sell 8 items via UPS according to their weight and destination - in addition to 1 item (a Rake) that I would like to ship at a flat rate (will go USPS but not necessary to calculate it through USPS).

If the customer orders one or more of the first 8 items, they get charged by total weight - if they want to also purchase a Rake, they get charged the total weight of the other items (that ship UPS) PLUS the flat rate for the Rake that will ship separately (via USPS).

How do I set this up?

Thank you very much.
Marlene