A golf specialty wholesaler operates 50 weeks per year. Management is trying to determine an inventory policy for its 1 -irons, which have the following characteristics: > Demand (D)=2,500 units/year > Demand is normally distributed > Standard deviation of weekly demand =2 units > Ordering cost =$30 /order > Annual holding cost(H)=$6.00 /unit > Desired cycle-service level =90% > Lead time (L)=3 weeks Refer to the standard normal table for z-values. a. If the company uses a periodic review system, P should be weeks. (Enter your response rounded to the nearest whole number.)