[ic] [Q] How to use the user tag in calc

Xiaowen Wu xiaowen@safetopia.com
Sat, 24 Mar 2001 22:07:22 -0800 (PST)

Hi, I'm new to interchange, and I have a very simple question, I would
like to calculate the shipping fee based on the sub-total, in other word,
the shiping fee = subtotal * 0.035, so I put the following into the 
checkout page:

but I cannot can the correct value. What I'm missing ? Thanks in advanced.