FUNCTION {{p}}sewer_sample
  IMPORTING
    iv_tank_litres TYPE i
    iv_distance_km TYPE i
    iv_mains_sewer TYPE abap_bool
  EXPORTING
    ev_skip        TYPE abap_bool
  CHANGING
    cv_fee         TYPE decfloat34
  EXCEPTIONS
    invalid_litres.

  ev_skip = abap_false.

ENDFUNCTION.