The Sales Summary shows sales figure over the years from 1999 to 2014. In 2015, sales slightly decreased. Investors want to know what the projected sales will be in 2017. One method for determining this value is to calculate the average annual growth rate per year, based on historical trends. For example, if sales were $200 last year and $500 this year, the average annual growth rate would be calculated as ($500 -$200/$200)/2. Calculate the average annual growth rate for 1999 -2015 and projected sales for 2017