Need help with B.

It is your responsibility, as the new head of the automotive section of Nichols Department Store, to ensure that reorder quantities for the various items have been correctly established. You decide to test one item and choose Michelin tires, XW size 185 x 14 BSW. A perpetual inventory system has been used, so you examine this, as well as other records, and come up with the following data: Cost per tire Holding cost Demand Ordering cost Standard deviation of daily demand Delivery lead time $ 25 each 15 percent of tire cost per year 1,180 per year $ 22 per order 6 tires 7 days Because customers generally do not wait for tires but go elsewhere you decide on a service probability of 98 percent Assume the demand occurs 365 days per year a. Determine the order quantity (Round your answer to the nearest whole number.) Answer is complete and correct. Order quantity 118 tires b. Determine the reorder point (Use Excel's NORMSINVO) function to find the correct critical value for the given a-level. Do not round intermediate calculations. Round "z'' value to 2 decimal places and final answer to the nearest whole number.) Answer is complete but not entirely correct. Reorder point 37 tires