The following table includes the information about a monthly time series. 
When the exponential smoothing method with α = 0.1 is applied,what is the MAD?
Definitions:
Marginal Revenue
The income enhancement from the sale of one more unit of a product or service.
Total Revenue
The total amount of money a company receives from selling its goods or services, calculated by multiplying the price by the quantity sold.
Total Revenue
The full amount of income generated by the sale of goods or services before any costs are deducted.
Price Per Unit
A measure that indicates the cost of a single unit of a product or service.
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