really need help solving. i dont know how to solve at all. thank you

LubeCar specializes in fast automobile oil change. The garage buys car oil in bulk at $3 per gallon, discounted to $2.50 per gallon if the order quantity is at least 1,000 gallons. The garage services 150 cars per day, and each oil change takes 1.25 gallons. LubeCar stores bulk oil at the cost of 1% of the cost of oil per day. Also, the cost of placing an order is $20. There is a 2-day lead time for delivery. Determine the optimal inventory policy. There is no demand or supply variability. Hint: First calculate the daily demand for oil. This is D. 1. What is the optimal order quantity if LubeCar wants the $3 per gallon price? | Select ] 2. What is the optimal order quantity if LubeCar wants the $2.50 per gallon price? [Select] (Note: optimal quantities may not be the same as EOQ!) 3. Does LubeCar have any savings in the total cost per day by going for the $2.50 per gallon price? If yes, how much does LubeCar save per day? [Select] 4. Based on this info, what is the optimal quantity for LubeCar to order? [Select] 5. What is LubeCar's average inventory? [ Select ] 6. What is LubeCar's reorder point? [ Select ]