LL eBook Tune Football Helmets Company is considering changing its current inventory control system for football helmets. The information regarding the helmets is as o follows: Demand = 170 units/week Lead time - 4 weeks Order cost = $40/order Unit cost $82 Carrying charge rate - 0.090 Desired service level 90 percent Standard deviation of weekly demand - 38 Number of weeks per year- 52 Compute T and M for a fixed period Inventory system model with and without safety stock. Use the rounded EOQ value in your calculations. Use Appendix A to determine z value. Round value to two decimal places. Do not found any other intermediate calculations. Round your answer for up to the nearest whole number and round your answer for M to the nearest whole number T: weeks M Check My Work (remaining 0