Unit price and margin adjustment in quotes?

Hi all!

My business acts as a consultant and reseller, therefore whenever I buy for my clients, the list price for items is different every time depending on the project, size of order etc.

I'm looking for a CRM that will allow me to adjust the unit buy price within a quote for each line and also adjust the margin for each line (or all together).

It would also need a view of the revenue, gross profit for that quote.

I don't seem to be able to find these features in any of the crm's I've looked at so far, I was hoping someone here might have an idea of where to look?