FUNCTION {{p}}drv_sample
  IMPORTING
    iv_lesson_type TYPE string
    iv_vehicle     TYPE string
    iv_minutes     TYPE i
  EXPORTING
    ev_block       TYPE abap_bool
  CHANGING
    cv_fee         TYPE decfloat34
  EXCEPTIONS
    invalid_minutes.

  ev_block = abap_false.
  cv_fee = 0.

ENDFUNCTION.