For the prior three years, sales for California Cement Company have been $20,011,000 (2015), $21,167,000 (2016), and $22,923,000 (2017). The company uses the prior two years’ average growth rate to predict the coming year’s sales. What were the sales growth rates for 2016 and 2017? What is the expected sales growth rate using a two-year average for 2018? What is the sales forecast for 2018?