Suppose that in an inventory of 20 items, 18% of the items account for 80% of the sales volume. The total sales of all the 20 items is $180,000 a year. How much inventory can be expected if turnover policy for A items=9, for Bitems=6 and for Citems=2? Generate a table, including items 1,2,3,4. Include the cumulative item fraction, projected cumulative sales fraction, projected cumulative sales, projected items sales, turnover ration and inventory average