Combined postage - how do I invoice it?

[SoupDragon]

OK, so a couple of buyers have bought multiple items. How do I invoice them with one combined postage amount?

(as an aside, I think I got more for the DVDs I've just sold than I paid for them! I was only selling them in a de-cluttering exercise!)

ebay does if for you and you can fiddle with the invoice post amount

Ah. I hoped it would be obvious when it came down to it. Thanks

Can you put in a sellers discount?

If you click "send invoice" you can amend it here but (as I have just discovered) you have to remember to check the tick boxes by both items [sigh]

Good job I don't need to look professional