If we assume A = the amount of candles she produces and sells then we can assume this equation.
(4.00×A) - ((A×1.50)+200)
The first part is calculating how much Claire makes at first with her candles being sold while taking account of the amoubt of candles and the cost for making one.
The second part is for the Amount of candles and the cost of starting and the cost of each candle and that amount is the amount Claire will lose and subtracted by the first amount.