A microprocessor plant that manufactures computer chips costs $\$400,000$ per day to operate. It costs $\$30$ to produce one chip which sell for $\$190 dollars. How many chips does the plant have to make to break even on one day operation?
Let X be the number of chips I need to make.
400,000 = 190X-30X (but I'm not sure this is even right). I'll continue anyway, I'll check it later...
400000 = 160X
X=2500\quad ?
2500 * 190 = 475000$ (its wrong)
Can someone help me? I think that formula I have is very wrong and I can't figure out another one...