The table below shows the advertising expenditures in $millions for the nine largest tech companies during the past year.Determine the 25th percentile or first quartile value here. 
Definitions:
Producer Surplus
The difference between what producers are willing to sell a good for and the price they actually receive, representing profit.
Marginal Revenue
Marginal revenue is the additional income generated from the sale of one more unit of a product or service.
Profit Maximizing
The process or strategy of adjusting production and operations to achieve the highest possible profit from business activities.
Economic Efficiency
A situation where resources are allocated in a way that maximizes the production of goods and services at the lowest cost.
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