What item do you find turns the fastest profit in the Trade Depot

Now that I have everything unlocked, I craft glue and buy cement to make gnomes, craft drills to make couches, and with extra materials make sneakers, suits, fries, and TVs. I make about 100k a day I guess, including the 20k taxes. I also make a few coins reselling items I find selling low on the global market, esp the more expensive items.