> I always ask myself, “If I were to double the price (from $0.99 to $1.99), would I lose more than half the sales?” This isn't very useful on its own; The ar

> I always ask myself, “If I were to double the price (from $0.99 to $1.99), would I lose more than half the sales?” This isn't very useful on its own; The arithmetic was never the hard part. Predicting your success is.