A forecasting method has produced the following data over the past 5 months shown in the data set.What is the mean absolute deviation (accurate to 1 decimals) ? 
Definitions:
Time-Driven Activity-Based Costing
An accounting method that assigns costs to products or services based on the actual amount of time they consume resources.
Customer Support Department
A division within a company responsible for helping customers with their queries, complaints, and other service-related issues.
Resolving Issues
The process of identifying, assessing, and solving problems that may arise in a business, project, or process.
Customer Cost Analysis
The process of identifying and evaluating the costs associated with acquiring and retaining customers, to determine their profitability.
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