Hi,

i have 2 products that conflict in shipping. If i only order strings it has free shipping.

if i order only order a t-shirt it has $5.80 postage.

however when i order both it has the option of free shipping which customers can select. how cna i make it so that if a t-shirt and an item with free shipping is bought they get charged for the t-shirt postage which is $5.80


rhys