If I have to do domain registration for a client, and pay for hosting, I record these as billable expenses. When it comes time to charge the client for these items + my time, I have to turn both expenses into an invoice and do another another for my time. This is 3 separate invoices, which is very messy and unprofessional. 

At present my only options are this, or else add expenses to invoice line items manually and don't record them in Zoho Invoices (which makes the entire expenses feature useless)

Are any of these options feasible, either now or for future development?

a) Allow outstanding (ie 'unbilled' billable expenses to appear in the line-item drop-down when creating an invoice, and when they are included on an invoice mark them as 'billed'

b) Allow a manual override to 'Mark as billed' for a billable expense that is currently unbilled

c) Allow Invoices to be combined/merged? That way I could generate my invoice, plus invoices from one or more billable expenses, and then 'merge' them all into  one invoice I can give to the client

This is the only problem stopping me from adopting ZoHo Invoices on a permanent basis, so I'd really like to see something done. How well do support requests fare around here?