By changing the calculation so that you sum the measures first will get you the desired results, i.e. Pg Avg should be:
sum([GLR SALES])/sum([PRINT PAGE SPACE])
Hope this helps!
Thank you so much! Something so simple - it works perfectly! I just went thru training a month ago, and do remember the instructor telling us about the difference between using SUM or not, but evidently it didn't register at the time!