Bell Helicopter produces a spare part with ordering cost of $2,000, inventory carrying cost of $400/unit/year, stock

Question:

Bell Helicopter produces a spare part with ordering cost of $2,000, inventory carrying cost of $400/unit/year, stock out cost of $1,850 per unit short, an annual requirement of 494 units, and one-week replenishment lead time. Demand during replenishment lead time has the following probability distribution:

Find the minimum-cost lot size and reorder point.