The Business Analyst for Ace Business Machines, Inc What Is the Forecast for This Year Using a Moving-Average

Multiple Choice

The business analyst for Ace Business Machines, Inc. wants to forecast this year's demand for manual typewriters based on the following historical data:
$$\begin{array} { | c | c | } \hline \text { Time Periad } & \text { Demand } \\\hline 5 \text { years ago } & 900 \\\hline 4 \text { years ago } & 700 \\\hline 3 \text { years ago } & 600 \\\hline 2 \text { years ago } & 500 \\\hline \text { Last year } & 300 \\\hline\end{array}$$
What is the forecast for this year using a moving-average forecast based on the last three years?

A) 163
B) 180
C) 300
D) 467
E) 510