ralrulato tha nnnularitu indav far tho fallnwina sales in Excel. Round each result to two decimals. 2. Using the popularity indexes calculated in Question 1a, predict the sales for each item if total sales for all items are expected to be 300 . 3. Using the popularity indexes calculated in Question 1b, predict the sales for each item if total sales for all items are expected to be 150 . 4. Using the popularity indexes calculated in Question 1c, predict the sales for each item if total sales for all items are expected to be 450