A firm with a production function Q = KL (where K is units of capital and L is units of labor) has an expansion path that is given by K = 2L. The wage rate (W) is $20 and the rental on capital is $10. 
Assuming that the firm is using the optimal mix of inputs for any given output level, the quantity of output using one unit of labor is ____.
Definitions:
Assembly
The process of putting together individual components or pieces to form a finished product.
Predetermined Overhead Rate
An estimated rate used to apply manufacturing overhead cost to jobs or products, based on a planned activity level and expected overhead costs.
Manufacturing Overhead
The indirect costs associated with manufacturing, such as utilities, maintenance, and salaries for management.
Fixed Manufacturing Overhead
The constant production costs that do not vary with the level of output, such as salaries of supervisors and depreciation of equipment.
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