Three spring scales are attached along a straight line as shown. The scale on the left is attached to a wall. A force of 15 N is applied to the scale at the right. 
What is the reading on the middle scale?
Definitions:
Machine-Hours
A measure used in costing to allocate expenses based on the number of hours a machine is operated.
Manufacturing Departments
Specific sections within a manufacturing company, each focusing on different aspects of the production process.
Customizing Department
A specialized section within a manufacturing operation focused on modifying products to meet specific customer requirements or preferences.
Predetermined Overhead Rate
A predetermined overhead rate is used to allocate manufacturing overhead costs to products based on a consistent formula, before the actual overhead costs are known.
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