It would be more sensible to say this:
Sell 1 million items at a net profit of $1 each.
Sell 100 thousand items at a net profit of $10 each and so on, than what OP stated. Because even if you sell a billion item at $1 if the item costs you more than $1 each to create, then you will be at a deficit's end.
It looks so easy to you so how many millions you already made from this formula please show us the buy the expensive cars you bought from this formula, I also have one formula very similar to yours buy a ticket in a lottery and pray that it will hit the jackpot do you will be rich, that's formula of yours is nonsense if you can't find products that you can sell and of course you need money to get more money to run a business
It is hard at the beginning but once you are used to it, it will be as easy as eating peanuts

. There are several ways to achieve this kind of result and one of the better methods are through affiliate system, network marketing (not the ponzi scheme pyramiding) and referral system.