please show all HANDWRITTEN work.

Problem 1. (Chapter 3: The Logistics/Supply Chain Product) Davis Steel Distributors is planning to set up an additional warehouse in its distribution network. Analysis of item-sales data for its other warehouses shows that 25 percent of the items represent 75 percent of the sales volume. The company also has an inventory policy that varies with the items in the warehouse. That is, the first 20 percent of the items are the items and are to be stocked with an inventory turnover ratio of 8. The next 30 percent of the items, or B items, are to have a turnover ratio of 6. The remaining C items are to have a turnover ratio of 4. There are to be 20 products held in the warehouse with sales on the warehouse forecasted to be $2.6 million annually. What dollar value of average inventory would you estimate for the warehouse? (Hint: This problem is similar to the class example of "80-20 curve". It is most convenient for you to work on this in Excel. Your fina completed work should look like the excel on Module2Ch03Slide 3-8. You can simply turn in your excel sheets.)