A company uses 85 circuit boards a day in manufacturing process. The person who orders the boards follow this rule: Order when the amount on hand drops to 625 boards. Orders are delivered approximately six days after being placed. The delivery time is normal with a mean of 6 days and standard deviation of 1.1 days. What is the probability that the supply of circuit boards will be exhausted before an order is received if boards were ordered when the amount drops to 625 boards.