Add custom CSS class to a specific menu item

hi there,
i’m using bloom as an optin plugin and would like to use a click trigger.
i was able to test it by adding a specific css class to an anchor.

is it possible to add that class (lets call it foobar) to a specifc menu item.
so lets say my main menu has 3 items

home
about
price

and i want price to have a css class called foobar. is that possible?

thanks

cheers

efini