For a (relatively) fixed cost of manufacturing, it becomes an optimization problem with 2 variables: price and volume. Volume is inversely proportional to price

For a (relatively) fixed cost of manufacturing, it becomes an optimization problem with 2 variables: price and volume. Volume is inversely proportional to price, so price too high and you start losing profits due to low sales, but price too low and you don't make enough per unit. Profit = Volume * (Price - Cost)