j = 1
while (j <= 3)
   hash = (null)
   test list = (null)   
   
   for each item in master category list
      if category is a 'Level j'
         add category to test list
      endif
   endfor
   
   for each data record
      get record category, record data
      for each test category
         if record category matches test category at level 'j'
            hash{test category} += record data
         endif
      endfor
   endfor
      
   foreach key in hash
      output hash(key)
   endfor

   j += 1   
endwhile