additional additionla always apply buy cart-discounts costs decides discount domestic friends help initial international items percentages price setting shipping sorted store t-shirt t-shirts website week

Hi there

I'm setting ou a t-shirt store on a friends website and want to specify the shipping costs so that for domestic shipping it's $5, international $12. But if someone decides to buy 2 t-shirts we'd like to add an additionla $1 to the shipping costs - how do I set that up?

anyone?

I tried using the Cart Discounts but as I'm no good at percentages couldn't get it to work and then it would always apply the discount to the initial t-shirt price and not only to additional items.

Can anyone help? I need to get this sorted this week.

Thanks
E