I have a table with columns Product, Units Sold, Sales manager.
Products values are A, B, C, D, E, F
Units sold is a simple integer
Sales manager values are Smith, Jones, Doe
Can I use SUMIFS to return the total units sold if manager name is Smith AND
Product is A, OR manager name is Smith and Product is B.

I tried to use OR in the second criteria argument, but cant get it to work.
I know there are other ways to solve this problem, but Im trying
specifically to understand what SUMIFS can and cant do.
Thanks.