It would be useful to be able to create sets of predetermined line items that could be selected by end users when entering deals, a bit like bills of materials.
For example: if when doing a deal for service ABC we know it is always going to contain products Z, Y, X and W.
The idea would be for the user to be able to select a set of products that would automatically add 4 line items, one for each product (with the user being able to edit quantities etc) instead of having to manually select each product separately.
Users will gain in efficiency and it will reduce the risk of mistakes (with the correct products always selected).