Although I'll leave your post here because it does have 2 relevant suggestions, I just want to point out that suggestions are things you already know aren't in the software. Since you say you haven't looked to see if the software already has the features you're suggesting it makes them more like questions than suggestions in the end hehe. In other words, post here for things you need that aren't already in the software. Hope that makes sense.
As for the answers you need, number 1 is already in both Basic & Pro versions, 2 & 5 are in the Pro version of the software. Number 5 is hazy for me, I haven't tried it so I don't know what it all entails, but it does have a report function for sales, I just don't know what is in the report.
The program isn't built with a database which will make it difficult to add your numbers 3 & 4 into it. I don't know if they ever intend to work things like this in or not, would be great, but I wouldn't hold my breath for it as the whole idea of the software is to do this without a database system for those who dont't have database experience etc. It could be a future addition at some point though, can't answer that part. I can say this isn't an accounting software so I don't think you're going to see accounting systems in there for your P&P, you just need to account for that cost in your shipping prices and call it good.
What's good about it though is that with the Pro version and the weight based shipping they have included in it, you can add that P&P cost in there a lot easier because you can account for it by the size/weight of your packages where in the basic version it's pretty much only by amounts of items. That may help you at least be able to add the cost in there with a more realistic dollar amount for most things.
Numbers 1 & 2 are covered with the PayPal email you get (or whatever your payment processing system is) which gives you all the information you need for their order as well as the new SKU number on the Pro version. The basic version does also give you all the information, it just doesn't have the SKU number system in it so you need to add things like that to your titles and such if you need clarification of an item number.
Hope that answers some of your questions. Good luck with it
