Modify a javascript to sort rows of priced items by descending profitability for a virtual pet site and modify a javascript to auto-close a tab upon pressing a button for purchase

Most of the work is done already. These scripts are used on a virtual pet site where players can make in-game currency by restocking their shops with items from non-player shops that restock a random assortment of items at random intervals. Once the non-player shops stop restocking certain items for a quantity of time, players can make a profit selling items to other players who need the items for quests, etc. Sample Page of what the script currently does (#1): [login to view URL] Sample Page of what the script currently does (#2): [login to view URL] Link to shop : [login to view URL] The added functionality that I need for this script is to : - Sort the series of items within a shop from the highest net profit item to the lowest profit item, with the highest net profit item appearing at the first row, left to right, in descending profitability order, up to down - A checkbox or button that would appear on every shop that lets me toggle to hide all items that yield a profit of less than 5,000 The added functionality that I need for this script is to : - Automatically close the browser tab after I successfully solved the captcha and click Purchase [X item] - Automatically tab to the captcha text field so that I don't have to double tab to type in the captcha The first script checks the lowest price (player's shop price) within the marketplace by querying the server for all the items within a non-player shop and calculates the net profit (revenue from selling at the lowest price within the marketplace subtracting the cost of purchasing the item) from buying the item and then subsequently displays it beneath the item. It also displays the colour red for a net profit of less than 10,000 and green for more than 10,000. It also caches all of the item's prices for faster retrieval, and can be purged for realtime updates when visiting the shop again. The second script lets me click an item within a shop and automatically launch a new browser tab with an automated input haggle price, which is 85% of the nominal cost that is displayed within the shop instead of redirecting me to the item purchasing page with the captcha and having to manually calculate a haggle price to input.