I have a chart of numbers pertaining to progress of a project by month. The
end of month dates are in a row across the top, the progress % are in
corresponding rows and columns below:

31-mar-06 30-apr-06 31-may-06 30-jun-06
5.5 3.4 1.2 2.6

I'm trying to do a SUM of HLOOKUP values to get a total progress for a given
month. For example, I need to see the total progress for end of May from end
of March: SUM(HLOOKUP(5.5) to HLOOKUP(1.2))=5.5+3.4+1.2 in a cell at the
end of the row. How can I do this? Do I need to use another function?
Thanx............TomCat