(Re) Introducing Frappe Books - Free Desktop Accounting Tool for SMBs

May I request for a feature here. For certain users multi currency invoices are a must have and within these users there is a usage case for a Currency Adjustment Factor in order to facilitate the rate differences based on the buying rate of said currency for that company at that point in time. The invoice should be able to bill in a number of currencies with the base including the CAF amount. If you dont understand what i am talking about, send me direct message.