A Wendy's fast-food restaurant sells hamburgers and chicken sandwiches. On the typical weekday, the demand for hamburgers is basically distributed with mean of 450 and standard deviation of 80 and demand for chicken sandwiches is normally distributed with the mean of 120 and standard deviation of 30.
How many hamburgers should the restaurant stock to be 99% sure of not running out on given day? Place you answer, rounded to the nearest whole number in the blank. For example, 345 would be a legitimate entry