The currency of Ghana is Ghana Cedi (C).
To make your way of living economically in Ghana, bargaining is a must, and prices at craft stall and in the market are quite negotiable.
ATMs are present almost everywhere and Visa cards are mostly accepted everywhere. Also, you can find exchange bureaus in most major towns. US dollar, UK pounds, and Euros are best currencies that can be exchanged easily at the foreign exchange bureau but make sure you bring $50 and $100 notes because smaller US $ denominations fetch lower exchange rates here.