To borrow from Caine, I think the best answer is that they are probably so wealthy we don’t have a number capable of describing how rich they are in actual terms (just as we don’t have a number to describe how many planets there are in the universe). Kalique says “it’s just a planet, Jupiter” as if a planet is entirely insignificant in the greater scheme of things, which strongly indicates how absurdly wealthy they are. The collective riches of Earth would be pennies to them. Unless you’re talking Titus, of course, in which case his actual cash holdings probably amount to the loose change he has in the pockets of his silk pyjamas (the film implies he has serious money problems). If I had to actually answer your question though, I’d have to say they have squillions upon squillions of dollars.