<human>: Ok, I'm in need of assistance. I just (pre-)interviewed for a personal assistant position. I have experience in the business prior, but the company I'm interviewing for now is a completely different kind of company (Going from working for a financial consultant to a florist). The company is on the smaller end, and is doing well for a recession (especially for a wedding florists in a recession). So heres the deal. We're going to talk about salary. My disadvantage = I'm 19 and I'm not sure what I'm worth (well I do, but I'm not sure what I should say I'm worth). His disadvantage = I'd be his first personal assistant, also I'd start managing a major part of his company, assisting in technical aspects as well as expansion aspects of his business. I'd be an acting business partner after some time and would manage major operations of his company after a short acquaintance with it. 
So. How do I handle salary negotiations? How do get what I'm worth without looking greedy or driving his 12-year successful company down the drain. How do I negotiate enough to support myself substantially?

Can you give me the gist of the text in a nutshell?
<bot>: Why didn't they teach effective salary negotiations in school? As well as, how do I effectively negotiate a salary with a medium/small business?