Entête de question

A market has the following limit orders standing on its book for a particular stock:

Buyer Bid Size (Number of Shares) Limit Price (£) Offer Size (Number of Shares) Seller
Keith 1,000 19.70
Paul 200 19.84
Ann 400 19.89
Mary 300 20.02
20.03800Jack
20.111,100Margaret
20.16400Jeff