Joe's Pizza orders some key ingredients, including pepperoni, from Italy.  Because of this, the lead time is 3 weeks.  Joe's uses an average of 150 lbs of pepperoni each week, with a standard deviation of 30 lbs.  Joe uses an order up to the level to manage inventory - his order up to level is S= 750.  Joe is about to place an order and notes that he has 500 lbs of pepperoni in his walk-in refrigerator and 100 lbs of pepperoni on order.  How many pounds of pepperoni does he order?