An Office Manager uses a Periodic Review Inventory System: they check the inventory in the Office Supply Closet once every 10 days, placing an order with their supplier depending on the inventory level in the closet. Once the order is placed, it takes 3 days to receive the order. The average demand for post it notes is 30 per day. This week, the manager has counted 140 post it notes in the closet. What is the Minimum Restocking Level (restocking policy) needed to cover expected demand over time without stocking out