Here are some quotes of the Burundi Franc/U.S. Dollar spot exchange rate given at once via internet by four banks: Bank Yellow: 1, XXXXXXXXXX Bank Purple: 1, XXXXXXXXXX Bank Blue: 1, XXXXXXXXXX Bank...

Here are some quotes of the Burundi Franc/U.S. Dollar spot exchange rate given at once via internet by four banks:

Bank Yellow: 1,945.8871-1947.2134
Bank Purple: 1,945.8921-1947.5021
Bank Blue: 1,947.3112-1948.9978
Bank Pink: 1,947.1981-1948.8697
According to these quotes; Are there any arbitrage opportunity?