Bluesky64 on "[Plugin: WooCommerce - excelling eCommerce] Maximum shipping costs"

In woocommerce i use a fixed shipping cost for each item.
so alle de shipping costs are summed up in the shopping cart.
This is wat I want, but I want to have a maximum ammount of shipping costs.
How can this be done?

http://wordpress.org/extend/plugins/woocommerce/