Modify score calculations. Ignore any survey item scores of 0.

Never include zero when performing calculations for scores.

config/initializers/array_monkey_patches.rb

@@ -2,6 +2,10 @@ module ArrayMonkeyPatches
   def average
     sum.to_f / size
   end
+
+  def remove_zeros
+    reject { |item| item == 0 || item.to_f.nan? }
+  end
 end
 
 Array.include ArrayMonkeyPatches