Order by ACF price

I am using this plugin to try and show a list of boats by price. It is working but rather than using numerical order is is putting any price starting with 9 first for example the first boats listed are:
PRICE: € 99,995 / PRICE: € 9,995 / PRICE: € 910,000
How do I make it do it actually shows the prices in numerical order

I am using the Dynamic order by Field option