Thanks for you response to my post.
Let me clarify what I said in my previous post where I said that a company's market cap is its (stock + debt - cash). You need to think of a company's market cap as what you would pay if you were buying the whole company in a total cash deal. Think of it as if you bought a house and paid $50,000 and assumed a mortgage for $50,000. The total price of the house is $100,000. However, lets say that the house comes with $30,000 of cash sitting in the cabinet drawer that the seller agreed to give you along with the house. Now you effectively paid $70,000 for the house ($50,000 + $50,000 - $30,000 = $70,000). Investors should think of what they are paying for company's the same way.
Your example of buy $10,000 of equipment would be like then spending $10,000 on renovations to the house and borrowing the money to do it. Assuming the renovations also increase the house value by $10,000 the house is now worth $110,000 but you now owe $60,000 on it so your equity is still $50,000 (and you still have the $30,000 cash).
I hope this explaination helps. The point is for all of use to learn from each other.
Good luck with your investing.