The forecasting staff for the Prizer Corporation has developed a model to predict sales of its air-cushioned ride snowmobiles. The model specifies that the S vary jointly with disposable personal income Y and the population between ages 15 and 40,Z, and inversely with the price of the snowmobiles P. Based on the past data, the best estimate of this relationship is S= K *YZ/P
where k has been estimated (with the pst data) to equal 100.
If Y=$11,000, Z= $1,200, and P=$20,000
a) what value would you predict for S?