Approximate price does not work

Hi,

I have 2 coins $ and Bs., by default the currency is $, but I would like to show the approximate price in Bs., but it does not show it, this is my configuration https://snipboard.io/1sy5Iz.jpg

I would also like to know how I can do so that the user at the end of the purchase appears in the detail of the order in addition to the price in $ the approximate price.

Thanks.