Check My Work (2 remaining) A shoe store developed the following estimated regression equation relating sales to inventory investment and advertising expenditures. y = 30 + 13x1 + 72 where 1 = inventory investment ($1000s) 12 = advertising expenditures ($1000s) y = sales ($1000s) a. Predict the sales resulting from a $15,000 investment in inventory and an advertising budget of $10,000. b. Interpret b1 and b2 in this estimated regression equation. 61 : Sales can be expected to - Select your answer - v|by $13 for every dollar increase in - Select your answer - | when - Select your answer - is held constant. b2 : Sales can be expected to - Select your answer - v by $7 for every dollar increase in - Select your answer - when - Select your answer - is held constant. Select your answer - inventory investment advertising expenditure Check My Work (2 remainin O- Icon Key Question 4