Karl's Appliances wants to plan inventory purchase for LED televisions. Monthly demand has ranged from 0 to 20, with a mean of 8. Mr. Karl wants to keep enough inventory to avoid a stockout 80% of the time. The demand appears to follow a Poisson distribution. Unit Demand Probability Probability stockout threshold Individual Cumulative or equal to the Unit Demand (use cell reference): Stockout Threshold: Monthly Demand Mean Value: H O GUA W N = OO N M U A WOO N 17 18 19 20 Ensure that Indivdual Probability Unit Demand cells can be copied to cumulative is greater than