13. A random sample of 10 items was selected from the 10,000-item inventory in the Sahara Marine Manufacturing Company. The following data were obtained.

a. Group the data in order of descending annual dollar use.

b. Select A items, B items, and C items.

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PART NUMBER ANNUAL USE (UNITS) COST PER UNIT PART NUMBER ANNUAL USE (UNITS) COST PER UNIT Q10 10,000 $13 V60 5,000 $ 7.50 R20 5,000 5 W70 2,000 S30 2,000 6 X80 200 T40 1,000 18 Y90 25,000 U50 100 55 Z07 500 2204