Question: What is the bid-ask spread?

Quote Find Code HBSHA QUOTE Quick Quote HERIT BANK 10MTH19 [HBSHA] (ASX:HBSHA) Price Today's Change $108.600 $.100 .09 % Bid $108.550 Offer $108.600 Hide Market Depth at 10/10/2012 05:34:57 PM Buyers Sellers No Qty Price Price Qty No 000's ($) ($) 000's 1 0.15 108.550 108.600 0.094 1 1 0.2 108.510 109.000 0.2 1 3 0.434 108.500 109.200 0.374 1 1 0.225 107.800 110.499 0.415 1 1 0.05 107.750 110.500 1 1 View Full Market Depth