How do I set one shipping cost for multiple listings?

[bestaquariumshrimpsuk]

Hello. How do I set one shipping cost for multiple listings? So that buyers can save money by paying one shipping cost for all items,.  I'm trying method with combined postage , by buyer '' request for invoice'' .

I advice buyers to add all items to basket and send request for invoice. Unfortunately buyers using mobile ebay application , can't see this way, can't use this method , can't find this option.

Any advice , how I can setup another method to give customers one postage cost for many items ??

My customers often ask for this.

[john1297576]

If a buyer buys more than one item, then you go to any of the items and click SEND PAYMENT DETAILS, in other words an invoice. All items come up all you need to do is edit the postage,  review just to check, and send.

If buyer fees are being added, it will not change those.