A? mail-order catalog business selling personal computer? supplies, software, and hardware maintains a centralized warehouse. Management is currently examining the process of distribution from the warehouse. The business problem facing management relates to the factors that affect warehouse distribution costs.? Currently, a handling fee is added to each? order, regardless of the amount of the order. Data collected over the past 20 months indicate the warehouse distribution costs? (in thousands of? dollars), the sales? (in thousands of? dollars), and the number of orders received. Complete parts a through h below.

State the multiple regression equation. Let X_1i represent the sales for month i (in thousands of dollars) and let X_2i represent the number of orders received during month i. (Round to three decimal places as needed.)