Help plz

I'm doing a single player run through hell fire. Well Adria has a staff I wanna buy for 186,804 gold. But I can't buy it because i don't have enough room in my inventory.....but the only thing in my inventory is all the gold stacks to buy it. Sooooo how do I buy it lol Someone in discord told me to use the amulet you get from the farmer, but I added in the commands, so he is the cow guy and I completed his quest already