1). Sales (Y) is in Units of $10,000.00 and Advertising(X) is in Units of $1000. If we want to calculate the value of sales when $40,912.00 is spent on advertising. What do we use for X in the following equation ? Y= 42.9+143.3x 2. Sales is in units of $1000.00 and advertising is in units of $100. What does the value of sales INCREASE in dollars when we increased advertising by one UNIT? The equation is: Y= 45.9+10,310.00X