please help solve these

The following multiple regression is constructed to estimate monthly sales for BEL. furniture Stores in Texas: SUMMARY OUTPUT A. Based on above regression output, formulate an equation to estimate Sales of a store based on square footage (sq. (eet). Showroom Inventory. Advertising Budget, Market Size, and \# of local competitors. 3. Observe the significant.F in ANOVA table and comment on the goodness of the regression at 1% significant level. is this egression suitable for application in sales estimation? Explain. What percentage of variation in Sales is explained by use of these independent variables? Explain. - Rank the independent variables based on their degree of contribution to Sales (highest contribution to lowest ontribution.) If the advertising budget is increased by $20,000, what is the incremental increase in Sales