How much does this cost to the nearest dollar?

Parkworld 60936 Marine Shore Power Extension Cord 50 AMP to Marine Shore Power Cord SS2-50 Male to Female 50A (25FT)
Connect Yacht 50A 4 conductors plug to Marine 50 AMP shore power outlet of dock. Six choices of length. STW stranded wire Extension cord, support max 50 AMP overload, Max Rate 7500 Watt (125V) / 12500 Watt (250V) Molded with electroplate copper terminal in order to avoid surface oxidation effectively. Heavy-duty for Dock, 100% copper conductor inside. Marine Locking SS2-50 Plug with locking ring, 125 Voltage/ 250 Voltage. Shore Power twist lock SS2-50 Receptacle with locking ring and collar (seal ring),

Price is $300.00

Price: $299.99