" Every established business wants to live on foolish and rich and will apply all possible and impossible tricks to convince."
If you actually believe that, I really don't see how we could have any meaningful conversation. That's a pretty extreme statement, and being a business owner myself, I know that I don't fit your description. You may not believe it, but it is possible for a survive by treating customers right and not playing tricks.
" I'm not rich, but wealthy and the reason why I am is because I do math the following way: How not to spend much on automobile maintenance, how not to spend much on energy, gas, healthy meals, comfortable quality apparel and certainly home and pro audio! Believe me my profession IS finding right numbers just about for anything around me. I breath with numbers, figure out mind behind each word written or spoken WITH numbers."
I have no doubt that you are very good at whatever you do for a living, numbers or otherwise. But that doesn't mean you can see things better than anyone else. I'm an MBA. I know several people here are engineers. We have some equipment manufacturers as well. And the list goes on.
Anyway, you didn't get the point of my last post. I understand that you are capable of eating healthy, fixing your cars or whatever. I believe you, and don't doubt a word of it. I was trying to say something else. If, for example, you called a company that makes dac's and asked them how much they pay for things like chips, or any other parts that go into the making a product, they won't tell you. And if they do give you a number, 99% chance they're lying. That's just the way it has to be in business. And as a result, you'll never know what they pay for the parts that go into their machines.