Goop Inc. needs to order a raw material to make a special polymer. (Assume that one gallon of raw material yields one gallon of polymer.) If demand is more than Goop can make, then Goop sells only what they made and the rest of demand is lost.



Suppose the demand for the polymer (for the upcoming selling season) is forecasted to be normally distributed with a mean of 300 gallons and a standard deviation of 110 gallons. How many gallons should Goop purchase to target 13% stock-out probability?



(Use the z-table from the lecture notes, and choose the closest answer.)





Multiple Choice
300
200
424
300