Exhibit 11.13
The following questions use the data below.
The owner of Tim's Toys wants to predict monthly sales. He has collected data for 12 months. He needs your help in analyzing this data using moving averages. 
-Refer to Exhibit 11.13. What formulas go into cells B7:B9 of the following partial spreadsheet where data for periods 9-12 represent actual data?
Definitions:
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