Question 21 (5 points) Continued from the previous question Bass-killer, a special plastic bait, is available at the Winona Fishing Cabin(WFC) at $10 per bag. The demand can be approximated by a normal distribution with a mean of 21 bags per week and a standard deviation of 3.4 bags per week. Lead time is 3 weeks, and there will be shipping cost $50 for each order. The new manager desires a chance of stockout of 5% or lower. and estimates the annual inventory holding cost is 20% of sales price. Assume 1 year = 50 weeks. In ROP, How many items are kept as safety stock ? (Use rounded ROP in the previous question or round to the integer)