Petromax Enterprises uses a continuous review inventory control system for one of its SKUs. The following information is available on the item. The firm operates 50 weeks in a year. Refer to the standard normal table for z-values. > Demand =50,000 units / year > Ordering cost =$35/ order > Holding cost =$2/ unit/year > Average lead time =3 weeks > Standard deviation of weekly demand =125 units a. The economic order quantity for this item is units. (Enter your response rounded to the nearest whole number.) b. If Petromax wants to provide a 90% service level, the safety stock is units (enter your response rounded to the nearest whole number) The table below shows the batal ares urder the normal curve for a point that is Z standard deviatians to the right of the mesn