The difference between the price at which a dealer is willing to buy a security and the price at which a dealer is willing to sell it$.$

Brent, a trader, wants to buy $1,000$ shares of XYZ stock, while a second trader, Amara, is willing to sell $1,500$ shares of the same stock. Unfortunately, Brent and Amara don't know one another and must complete their transactions using the stock exchange's market$-$making dealer. XYZ$\text{'}$s market maker is willing to sell her shares for $$32\mathrm{.}50$ per share and purchase additional shares for $$31\mathrm{.}50$ per share. Select the most appropriate values in the following table:

$\backslash$table$[[$Term$,$Value$],[$Bid price,$],[$Ask price,$],[$Bid$-$ask spread,$]]$

If the market maker is willing to purchase the entire block of $1,500$ shares from Amara and, from that block, resell $1,000$ shares to Brent, then the market maker's net profit from Brent's transaction$-$excluding any inventory effects$-$will be

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