Ava drafts and edits invoices

Ask Ava something like *"invoice Acme for 3 hours of design at 120 and the monthly retainer template"* or *"take the travel line off INV-1042"*. Ava answers with a card showing the client, the lines and the total.

• Nothing is written until you press Apply on the card. Apply makes or changes a draft only; you send it yourself.
• A price is filled in only when you said it, or it comes from a template or from Inventory (and you can see Inventory prices). Any other line says Needs your amount and must be typed on the card first.
• An edit is all or nothing: if one change cannot be made, none of them is.
• Only people who can bill clients can use it. Ava cannot send, take a payment, void or refund.