You are interested in trading the stock GOAT. You are given the bid-ask details for GOAT stock.

Bid Ask
$52.00 X 200 $55.00 X 200
$51.50 X 300 $55.25 X 300
$50.75 X 500 $55.75 X 600

If you are looking into a market sell order for 800 shares, what will be the lowest price you receive?