National Geographic still sells a considerable number of copies. Its demand for the April issue is forecasted to be normally distributed with a mean of 80 and a standard deviation of 35.

1. If the Penn Bookstore stocks 100 copies, how many copies can they expect to return to the publisher at the end of the month? (National Geographic is a monthly periodical.) (Answer to 1 decimal place i.e. XX.x)

2. Consider another magazine, Green Business. The forecast for an issue is Poisson with mean 4.25. How many issues should the Penn Bookstore stock if they want to ensure a 99.6% in-stock probability?