how many francs is the combined total pension for a single person and a couple prior to the raise?
return a single person ;return a couple ;return pension in  francs of #1 ;return pension in  francs of #2 ;return #3 prior to the  raise ;return #4 prior to the  raise ;return sum of #5 and  #6
['select', 'select', 'project', 'project', 'filter', 'filter', 'arithmetic']