Countif??

Hi all

I'm having issues working out the formula for a countif or dcounta i think i might need.

First column is Salesman and second is company sold to. I'm trying to work out how many the salesman has sold without counting the blank cells. I don't need to know which companies, just the total over all. Obviously this list will increase with more sales.
So if salesman is JA then total companies sold to is ?? etc.

please see attached example.

Thanks.