Question 4 This inventory control model that specifies inventory is ordered at the end of a predetermined time period. The interval of time between orders is fixed and the order quantity varies. a. single-time period mode b. fixed-time period model fided-order quantity model d. all of the above Moving to the next question prevents changes to this answer. Question 5 it is the preferred measure of supply chain efficiency that is mathematically the inverse of inventory turnover times 52 a. inventory turnover O. cost of goods sold C. average value of inventory d. weeks of supply 1 A Moving to the next question prevents changes to this