Abdoulie runs a national chain of news stands. His largest store is on 5th Avenue and 14th St in New York City. That newsstand sells the Wall Street Journal which is stocked at a marginal loss of $1.60 and a marginal profit $1.20. Daily sales averages 500 papers with a standard deviation of 70 papers. What should Abdoulie's optimum stocking policy for the Wall Street Journal be?