Bob owns Bob's Window Service, a $2$ sole proprietorship where he installs windows. Bob does not have

dental insurance, so he agrees to install five new windows at his dentist's house in exchange for a root

canal. Bob's dentist charges his patients $$800$ for a root canal. Bob usually charges $$100$ per window

Or

installation. How much income does Bob have to report because of this barter transaction?

AS$800$

B$.$S$500$

C$.$$$300$