can you please show all steps

Problem I. Problem 2. Each month, a gas station sells 4,000 gallons of gasoline. Each time the parent company rells the station's tanks, it charges the station $50 plus 70, per gallon. The annual cost of holding a gallon of gasoline is 30. (a) How large should the station's orders be? (b) How many orders per year will be placed? (c) How long will it be between orders? Suppose that the demand for a product is 30 units per month and the items are withdraw at a constant rate. The setup cost each time a production run is undertaken to replenish inventory is $15. The production cost is $1 per item, and the inventory holding cost is $0.30 per item per month. (0) Assuming shortages are not allowed, determine how often to make a production run and what size it should be. (b) If shortages are allowed but cost $3 per item per month, determine how often to make a production run and what size it should be