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 total cost when using one unit of labor is $____.
Definitions:
Target Selling Price
The price at which a company aims to sell its product after considering desired profit margins over cost.
New Product
A product that has been recently developed or introduced to the market, offering new features or benefits not previously available.
Value-Based Pricing
A pricing strategy where the price is set based on the perceived value to the customer rather than the cost of the product or market prices.
Differentiation Value
The unique attributes or benefits that make a product or service stand out from competitors, enhancing its market appeal.
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