Im only 16, and have just started year 11 in high school, keep this in mind!

I want to know how to invest in companies, how much to invest, which companies to invest in and how much money this would make me, if any.
Because I have no idea, all I know is that investing makes money, that's it, I tried asking my mam but she just laughed in my face and no one else knows.
Also, to become a manager without starting at the bottom as an employee, is that possible? If so, how do I do it?

I may sound like a power hungry tyrant (quote from my friend) but I want everything to be clear to me and I want to be told what I CAN do rather than be told what I cant.
Management is an attractive career to me but I'm still not sure, and I haven't talked to anyone about this other than my friends because, like my mam, they laugh in my face and get on my nerves by telling me the negative.

Im really interested in this so answers and further explanation would be REALLY really really X 100 helpful and I will say thank you loads! :)

three examples each of the following; variable direct cost, variable indirect cost , fixed direct cost , fixed indirect cost, sem-variable direct and semi-variable indirect cost

three examples each of the following; variable direct cost, variable indirect cost , fixed direct cost , fixed indirect cost, sem-variable direct and semi-variable indirect cost I need explanation as well as answer to the above question.

I have no idea what any of those are.
What question? Mine?
Can you explain what your talking about because I have asked several questions and I don't know which these apply to or what they are. (I am a dense child)