1 . The quarterly sales data (number of copies sold ) for a college textbook over the past 3 years are as follows in the Table below: QUARTERLY SALES Quarter Year 1 Year 2 Year 3 16 18 18 9 9 11 AWN 26 29 29 25 23 26 a) Compute seasonal indexes for the 4 quarters When does the textbook publisher experience the largest change in sales ? Does this result appear to be reasonable ? Explain c) Using the information on seasonality , compare a 4-quarter moving average to trend projection model and an exponential smoothing with a smoothing constant of 0.2 . d) Use the selected model to generate a forecast for sales for the first quarter of Year 4. 2. Sarita Uribe opened a new beauty products retail store . There are numerous items in inventory, and Sarita knows that there are costs associated with inventory. However, her time is limited so she cannot carefully evaluate the inventory policy for all products . Sarita wants to classify the items according to the dollars invested in them The following table provides information about the 10 items that she carries : ITEM NUMBER UNIT COST ($) DEMAND (UNITS ) E102 800 D23 1200 D27 700 R02 R19 200 5107 6 50 5123 1 1200 U11 800 U23 1500 V75 1500 Use ABC analysis to classify these items into categories A, B, and C. b) Develop a cycle policy if class A items are to be reviewed every 20 days , B items every 60 days , and C items every 120 days . 3. Barbara Brown is the purchasing agent for Central Valve Company, which sells industrial valves and fluid -control devices . One of their most popular valves is the