How much does this cost to the nearest dollar?

GIVI Monokey Topcase Mounting Adapter - BMW F650GS / F700GS / F800GS / F800GS Adventure
Monokey Topcase Adapter with aluminum plate Works with any Givi Plastic or Aluminum Monokey Top Case such as DLM30, DLM46, E360, E460, E52, E55, OBK42, OBK58, TRK33, TRK46, TRK52, V40, V46, V47, V56 Maximum load allowed 6 kilograms It does not allow the assembly of the stop light kit or the remote control device on the case To be mounted on the original luggage rack Can not be mounted with PL690 Monokey Side case racks Bike specific mounting hardware and plate in aluminum for Givi Monokey

Price is $158.00

Price: $158.4