Suppose the price of good Y is $18. Use the information given in the figure below to answer this question. Quantity of Y m Demand for X Price of X 15 36 42 Quantity of X Quantity demanded of X When the price of X increases from point S to point R along the demand curve, $ of income must be temporarily given to the consumer to isolate the substitution effect. Multiple Choice O $1,000 O $1,080 none of these $750 O $180