I use this strat of grinding, the Reactive chemical boxes go for about 6 k each without muiltiplier, i dont usually bother with the other boxes or radioactive ones, they are usually just wastes of time, and the radioactive boxes dont even give that much
These ways actually helped me because I started off with like 97,000 and in like a week or 2 later I got 1 million i finnaly have enough money to purchase aresonius by the time it comes out