In finance, an exchange rate is the rate at which one currency will be exchanged for another. It is also regarded as the value of one country's currency in relation to another currency
A telegraphic transfer (TT) is an electronic method of transferring funds utilized primarily for overseas wire transactions.
A remittance is a payment that gets sent somewhere else. If you get a bill in the mail, you will usually have at least a week to send your remittance. To "remit" is to send money or make a payment and what you send is called remittance