Need some modifications to a userscript(Tampermonkey/Greasemonkey/etc) for Subeta(a virtual pet site) to sort listed items by price and some minor tasks

The script that I have shows the profitability of any item that I purchase from a shop in this virtual pet site game by taking the cost of the item purchased and comparing it with the lowest listed price by other users. I need the script to re-arrange the listings in an orderly way such that the most profitable items appear first.. For example this is what I see at this shop.. [login to view URL] [login to view URL] Also an additional button that lets me hide all items that yield a profit of less than 5,000 (5k) would be nice too. Looking for someone that can start work immediately, is fast, and can continue to communicate one-on-one. Faster acceptance for people who have high completion rate, nearly zero negative ratings and competitive/reasonable rates... not like.. $60 for something as simple as sorting/rearranging rows by a numerical array of data -_-