Please​ need help show clear work with calculations thank you….

You want to optimize the quantity of product shipped to your 11 retail stores from your four distribution centers to minimize the cost. However, you do not know what demand will be at your retail stores. You have some idea of expected demand (mean) and the dispersion (standard deviation) and

1) Want to estimate what your maximum expected costs will be 70% of the time? 2) You want to know the probability of costs being no more than $50,000?