This is describing the interface of the software, can you please explain in other words what is mixed with in this context?
I still don't understand what is to supply a digital wallet...
On this screen we can choose all currencies that might supply our account in order to trade. Government currencies, the so-called "fiat money", are mixed with various crypto currencies. There are some options, we can supply our account with
421 Bitcoins. The wallet will compute the total amount based on the present exchange rates.
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It means that your account can have more than one type of currency, for example, you could have $1523.98 (US), £1,237.12 (British pounds), €286.45 (Euro), ¥134,322 (Japanese Yen), and 0.421 Bitcoins.
The wallet will compute the total amount based on the present exchange rates.