Naira sells for n375 to 1 dollar on official market

That's a great piece of information!

So, according to your statement, the official exchange rate is:

1 USD = N375

This means that if you exchange 1 US Dollar (USD) for Nigerian Naira (NGN) on the official market, you would get approximately N375.

Is there anything else you'd like to know or discuss about the Nigerian currency or exchange rates?