In string theory, one of the many vibrational states of the string corresponds to the graviton, a quantum mechanical particle that carries gravitational force. Thus string theory is a theory of quantum gravity.
Their average web application development cost is around $500K and their staff or contractors' salary is in the six figure plus range. Their proposals are usually based on a lot of fluff with the development rate ranging from $400 - $800 per hour. These types of companies focus on custom development.
For a prototype of a game or app, I >charge an hourly rate. You have to take a look at your overhead, taxes, >and other expenses. For me I charge $85-115 USD per hour depending on >the content I'm producing. So for a week at 40 hours, for prototype of a >game, I'd charge about $3800.