You are using a fixed time-period inventory model. You are carrying huge amounts of safety stock despite setting a modest 80% service level, it is probably because Group of answer choices The fixed time period model does not include safety stock The cost of overestimating is greater than cost of underestimating demand, so I should order more than the average There is probably a lot of lead time variance in this system There is not enough information given to answer this question There is probably a lot of demand variance in this system