A foreman wants to use an 
chart to control the average length of the bolts manufactured.He has recently collected the six samples given below. 
Calculate the average range.
Definitions:
Average Costs
The total costs (fixed and variable) divided by the total quantity produced, indicating the cost per unit of output on average.
Selling Price
The amount of money charged for a product or service, or the sum of the value that customers exchange for the benefits of having or using the product or service.
Product Costs
Product Costs are the costs directly associated with the production of goods or services, including materials, labor, and manufacturing overhead.
Financial Reporting
The process of disclosing financial results and statements to stakeholders (such as investors and creditors) to provide insight into a company's financial health.
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