Corrections needed for the answer you provided me:
Now, Suppose Goop purchases 425 gallons of raw material. How many gallons of demand on average would remain unfulfilled?
I don't think your answer of 28.8 Gallons is correct. This is the same exact answer that was given to me for 300 gallons of raw material.
Please re-calculate. Can you explain why the probability of stockout and (un)Fill Rate in 2.5 and 2.6 might be different? The answer given is short and vague.
Clarify.