in a continous review inventory system, the lead time for door knobs is 4 weeks. The Standard deviation of demand during the lead time is 125 units. The desired cycle service level is 90 percent. The supplier of door knobs streamlined its operations and now quotes a 1 week lead time. Refer to the standard normal table for z-values.

-How much can the safety stock be reduced without reducing the 90 percent cycle-service level?

The safety stock can be reduced by __ door knobs. (rounded to the nearest whole number)