Perform a multiple regression analysis using the file warecost.xis. This is a mail-order catalog business selling personal computer supplies, software, and hardware. Management wants to study the factors that affect warehouse distribution coste. Currently. a small handling fee is added to each order, regardless of the amount of the order. Data collected over the past 24 months indicate the warehouse distribution costs (in thousands of dollars), the sales (in thousands of dollars), and the number of orders received. a. State the multiple regression equation. b. Interpret the meaning of the slopes, by and b2, in this problem. d. Predict the mean monthly warehouse distribution cost when sales are $400,000 and the number of orders is 4,500