I would like to charge a surcharge on certain shipping methods that I have set up in Ceon Advanced shipper. I can no longer find documentation for the plugin, so I just wanted to know if anybody knows if this is the right format for adding a $6.75 surcharge to a product and then increasing the shipping fee by a percentage if multiple products are ordered.

I put the following text into the surcharge field and the 150% just added $1.50 to the shipping instead of increasing it by a percentage. Does anyone know if this is the right format:

<numitems>*:150%+6.75</numitems>

Thanks,