Exhibit 11.1
The following questions use the data below.
Honest Al's Used Cars wants to predict how many cars are sold each month. He has collected data for 12 months. He needs your help in analyzing this data using moving averages. 
-Refer to Exhibit 11.1. What formula should be entered in cell C13 to compute the 4-month moving average forecast for month 11?
Definitions:
Gains from Trade
The increase in welfare or overall efficiency that arises from individuals or nations engaging in voluntary exchange or trade.
Increase in Total Output
A rise in the quantity of goods or services produced by an economy or firm.
Specialize
The focus on a narrow area of activity or field of study, which often leads to increased efficiency and effectiveness in producing goods or offering services.
Tasks
Specific pieces of work to be done, often as part of a broader project or job.
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