How much is $1 dollar in Mana?

Could you possibly explain to me, in a clear and concise manner, how much the equivalent of one US dollar would be in terms of Mana? I'm attempting to understand the current exchange rate between these two currencies, but I'm having some difficulty grasping the concept. Would you mind elaborating on the process of conversion, and perhaps providing me with an up-to-date figure for this exchange? Your assistance in this matter would be greatly appreciated.