Change column order in pivot chart?

[Icehousman2]

I have a Pivot chart that displays total sales by quarter. Such as "Jan-Mar", "Apr-Jun", etc. The problem is that the chart puts "Apr-Jun" first because it sorts it alphabetically. I have already searched this forum for help, but everyone seems to reference column headings in a cross-tab query, and that doesn't make much sense to me. If anyone could help me out I would really appreciate it. This is the last thing I need to fix, and the boss is getting restless. Thanks.