My question is in regard to the following McK case http://www.mckinsey.com/careers/interviewing/electrolight, especially question number 2! Regarding my background, I am a specialist in mathematics and I could solve the math part of this case easily, but I have some weak spots, when it comes to economical terms. Problem: If the launch of a new product, produces cost of 40 Mio. € and each sold bottle generates 1 € profit, is it not the easiest solution, to just wait till enough bottles got sold and the cost are covered? Or do I need a certain share of market? If a total market includes 8 billion gallons, does that mean, that each year an amount of X (in this case 8 billion gallons) is consumed? Would the common definition then be, that the market share, sizes the volume or revenue of a market for one year? But if so, the question should be “what share of the electrolyte drink market would Electro-Light need to capture in order to break even within one year?” or do they assume that automatically by mentioning “break even”?