Avgas 80

http://postimg.org/image/8lxw37itf/I hope someone will just do this out of goodwill. If you know about Avgas 80, then FANTASTIC.The above link has a picture of a calculation regarding Avgas 80.Just please tell me if the slide is right or wrong.I haven’t any money… I just need to know if the answer is a right or wrong.

 
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