Regarding Options as an expense I don't see how to calculate them. The options I received were at or about the market price when they were granted. Which meant that I had to pay market price for the stock. Only by holding the options and the stock going up did I make money.
I still view them as an interest free loan. That is if the company went out and bought the stock when the options were granted, to exercise them the employee had to pay that amount. It could be 3-5 years later, so the company held the stock for the employee until they are exercised.
Look at AMD having to reprice the options because the stock had dropped and the options were priced at 20. Does that cost the company. I don't think so, they reprice the option at $5 and repurcase that amout and hold until exercised.