Dashboard Management

I would love to have a breakpoint to manage multiple currencies in the system. My business is in India and client is in USA which effectively means that we raise invoices in USA and receive payments in INR. The moment an invoice is generated in USD and marked as paid, the dollar amount gets added as a deposit in the bank account. I dont want this. 

What i want - The moment i mark an invoice as paid, basis the variation in invoice currency and account's primary currency, i should get an option to enter the primary currency amount that i have received. The typed amount must reflect in the dashboard. It will also help in marking expenses againt the primary currency of the account.