Showing two Alternate States in one table?

[#1]

Hi all - I'm trying to make a table which shows the result of a comparative analysis, but I don't know how to reference both alternate states of my field in question.  What I would like to do is show the user's two selections in the field [Buyer] in one straight table object with a number of other fields, but QlikView is rejecting my expression.  I thought it would have been something like;

=sum({<Buyer={AS1::Contractor,AS2::Contractor}>} Amounts)

Unfortunately, that doesn't work.  Any help?

[Gysbert_Wassenaar]

Try =sum({<Buyer=AS1::Contractor>+<Buyer=AS2::Contractor>} Amounts)