A sample of five full-service gasoline stations, each carrying three grades of gasoline, was taken, and the price per liter (to the nearest cent) was recorded for each grade of gasoline, as shown in the following table. 
What is the mean price of unleaded plus gas?
Definitions:
Neglected
Failing to care for properly or giving insufficient attention to, often leading to adverse outcomes.
Timid
Showing a lack of courage or confidence; easily frightened or hesitant.
Withdawn-rejected
Pertaining to individuals, especially children, who are socially withdrawn and subsequently rejected by their peers.
Isolate
To separate an individual or object from others, either physically or socially.
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