In the following example, what is the safety stock savings from using a mixed service level? (Select the best answer.)

a. 10%

b. 15%

c. 20%

d. 25%

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Constant Service Level Mixed Service Level Item Service Forecast Safety Service Forecast Safety Category Level Error () Stock Level Error () Stock ABC 95% 100 95% 100 95 125 90 125 95 100 85 100 Total Total