1. Johnson Software has developed a new software package. The companys marketing department has prepared the following forecasts for the new software with probability distributions describing the likely levels of sales and income (or loss) under each scenario.

   Monthly Sales (units)	Probability	Income (Loss)
   10,000	20%	$14,000
   20,000	30%	$10,000
   30,000	30%	$30,000
   40,000	20%	$60,000

   If Johnson goes ahead to market its new software package what is the expected monthly gain in income that it should include in its plan for the coming year?