%p
  - accepted = Questionnaire.joins(:school).where("bus_list_id = '#{bus_list.id}' AND acc_status = 'accepted'").count
  = pluralize(accepted, 'person has', 'people have')
  been accepted but not yet RSVP'd.

%p
  - accepted = Questionnaire.joins(:school).where("bus_list_id = '#{bus_list.id}' AND acc_status = 'rsvp_confirmed'").count
  = pluralize(accepted, 'person has', 'people have')
  RSVP'd as attending but didn't sign up for the bus.