Base shipping cost

Nice plugin.
I am having problems getting the base shipping cost to show up however. I have added it in on the admin page (using $ and no $) but it just never shows up.
You can see here at the following URL:
http://nesterprints.co.nz/jewellery/
It works fine if I apply the shipping cost to each individual item, but that isn’t the way I need it to work.

Thanks

http://ww.wp.xz.cn/extend/plugins/wordpress-simple-paypal-shopping-cart/