Change in currency exchange rate

[corner shop]

I want to change the currency conversion rate
Currency: the Yemeni riyal against the dollar.
The current exchange rate: 250.25 Yemeni riyals, against the dollar. this is not true

I want to change this against the dollar?
I have two options, which one is better

first suggestion
Adoption of the permanent exchange rate
1 dollar = 600 Yemeni riyals

second suggestion
Processing automatic connection to the local bank and approving its exchange rate
bank link
http://www.kuraimibank.com/en

How can I handle the situation together? The best suggestion
Thank you

 

[GordonParker965]

The first option, of course, is good, but the second one is not bad either. Exchanging money is not a problem, but we want to do it at the most favorable rate. Indeed, the bank offers a good rate, but it is lower than you would like. Maybe you should wait or find another bank? For example, https://www.girokontokuendigen.de/de/, in my opinion, is one of the best because it offers its customers favorable conditions. I have been using their services for many years and have even opened a checking account for my business. So far, there has not been a single problem that the bank could not solve with my clients.