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A manufacturing company

I have attached a statistics problem that I would like solved so I can use it as an example in working others.

Please see attached file for full problem description.

Moving averages
A manufacturing company is using -month moving averages to analyze the sales of one of its products. Sales data (in thousands of dollars) for the product for the most recent months are shown in the middle column of the table below. Also shown is a time series plot of the data.
In the far-right column of the table are the -month moving averages for the data. Fill in both blanks in this column. Round your responses to at least two decimal places.