INTERFACE {{p}}if_laundry_fee PUBLIC.
  TYPES ty_item TYPE c LENGTH 7.
  TYPES ty_service TYPE c LENGTH 4.
  TYPES ty_reason TYPE c LENGTH 10.
  TYPES ty_quantity TYPE i.
  TYPES ty_amount TYPE p LENGTH 7 DECIMALS 2.
  TYPES ty_flag TYPE abap_bool.

  TYPES:
    BEGIN OF ty_order_line,
      item     TYPE ty_item,
      service  TYPE ty_service,
      quantity TYPE ty_quantity,
      express  TYPE ty_flag,
    END OF ty_order_line.
  TYPES tt_order_line TYPE STANDARD TABLE OF ty_order_line WITH EMPTY KEY.

  CONSTANTS:
    BEGIN OF c_reason,
      ok      TYPE ty_reason VALUE 'OK',
      item    TYPE ty_reason VALUE 'ITEM',
      service TYPE ty_reason VALUE 'SERVICE',
      qty     TYPE ty_reason VALUE 'QTY',
    END OF c_reason.

  CONSTANTS:
    BEGIN OF c_item,
      shirt    TYPE ty_item VALUE 'SHIRT',
      trousers TYPE ty_item VALUE 'TROUS',
      suit     TYPE ty_item VALUE 'SUIT',
      coat     TYPE ty_item VALUE 'COAT',
      dress    TYPE ty_item VALUE 'DRESS',
      curtain  TYPE ty_item VALUE 'CURTAIN',
    END OF c_item.

  CONSTANTS:
    BEGIN OF c_service,
      wash TYPE ty_service VALUE 'WASH',
      dryc TYPE ty_service VALUE 'DRYC',
      iron TYPE ty_service VALUE 'IRON',
      mend TYPE ty_service VALUE 'MEND',
    END OF c_service.

  CONSTANTS:
    BEGIN OF c_price,
      shirt    TYPE ty_amount VALUE '3.50',
      trousers TYPE ty_amount VALUE '5.00',
      suit     TYPE ty_amount VALUE '12.00',
      coat     TYPE ty_amount VALUE '14.50',
      dress    TYPE ty_amount VALUE '8.00',
      curtain  TYPE ty_amount VALUE '9.50',
    END OF c_price.

  CONSTANTS:
    BEGIN OF c_factor,
      wash TYPE i VALUE 100,
      dryc TYPE i VALUE 180,
      iron TYPE i VALUE 40,
      mend TYPE i VALUE 220,
    END OF c_factor.

  CONSTANTS c_max_qty           TYPE ty_quantity VALUE 99.
  CONSTANTS c_bulk_min_qty      TYPE ty_quantity VALUE 10.
  CONSTANTS c_bulk_discount     TYPE i VALUE 10.
  CONSTANTS c_express_surcharge TYPE i VALUE 25.
  CONSTANTS c_min_fee           TYPE ty_amount VALUE '5.00'.

  METHODS check_item
    IMPORTING iv_item          TYPE ty_item
              iv_service       TYPE ty_service
              iv_quantity      TYPE ty_quantity
    RETURNING VALUE(rv_reason) TYPE ty_reason.

  METHODS calculate_fee
    IMPORTING iv_item       TYPE ty_item
              iv_service    TYPE ty_service
              iv_quantity   TYPE ty_quantity
              iv_express    TYPE ty_flag
    RETURNING VALUE(rv_fee) TYPE ty_amount.

  METHODS calculate_order
    IMPORTING it_lines        TYPE tt_order_line
    RETURNING VALUE(rv_total) TYPE ty_amount.
ENDINTERFACE.