Can you please help me answer 2A and 2B below?

2. (20 points) Goop Inc. needs to order a raw material to make a special polymer. The demand for the polymer is forecasted to be normally distributed with a mean of 300 gallons and a standard deviation of 100 gallons. Goop sells the polymer for $25 per gallon. Goop purchases raw material for $8 per gallon and must spend $9 per gallon to dispose of all unused raw material due to government regulations. (One gallon of raw material yields one gallon of polymer.) If demand is more than Goop can make, then Goop sells only what it has made, and the rest of the demand is lost

2A) How many gallons should Goop purchase to maximize its expected profit? My answer_______________________ Show your work below: 2B) Suppose Goop purchases 150 gallons of raw material. What is the probability that it will run out of raw material? My answer___________________________ Show your work below: