(Situation F) the Sales (In Thousands of Dollars) of Automobiles

Essay

(Situation F) The sales (in thousands of dollars) of automobiles by the three largest American automakers from 1986 through 1992 are shown in the table below. $$\begin{array} { l r c r } \hline \text { Year } & \text { G.M. } & \text { Ford } & \text { Chrysler } \\\hline 1986 & 8993 & 5810 & 1796 \\1987 & 7101 & 4328 & 1225 \\1988 & 6762 & 4313 & 1283 \\1989 & 6244 & 4255 & 1182 \\1990 & 7769 & 4934 & 1494 \\1991 & 8256 & 5585 & 2034 \\1992 & 9305 & 5551 & 2157 \\\hline\end{array}$$
-Using 1986 as the base year, find the simple composite index for 1992.