For a certain product it was found that annual sales volume could be well described by a third-order autoregressive model. The estimated model is shown below. xt=183+1.50xt10.39xt2+0.11xt3+t For 1990,1991 , and 1992, sales were 899,931 , and 970 , respectively. Calculate sales forecasts for the years 1993 through 1995. x^1993=1,373.8 (Round to one decimal place as needed.) x^1994= (Round to one decimal place as needed.) For a certain product it was found that annual sales volume could be well described by a third-order autoregressive model. The estimated model is shown below. xt=183+1.50xt10.39xt2+0.11xt3+t For 1990,1991 , and 1992, sales were 899,931 , and 970 , respectively. Calculate sales forecasts for the years 1993 through 1995. x^1993=1352 (Round to one decimal place as needed.)