A motel had the following annual sales revenue and average room rate figures for the last five years. During this five-year period there were no changes in the number or type of rooms available and the clientele remained basically the same.

Prepare trend index numbers from the average room rates using 100 as the base index number for year

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Annual Year Sales Revenue Average Room Rate 1 $1,401,429 $75.00 2345 $1,429,367 $76.30 $1,480,552 $77.60 $1,520,700 $78.50 $1,553,091 $79.90