calculate work timesheet for microsoft excel

**please see attached file** At work we have a timesheet. In the time sheet you put in the time you started i.e. 9am, amount time you had lunch i.e. 30 minutes and the time you finish. Then there is a column that you put in the hours worked for that day, you calculate that from the time you start to finish and subtract the minutes for lunch. I want this to be done automatically. Therefore when I enter 8 (am start) 30 (lunch) 4.30 (pm finish) the calculation would come to 8 (hours). Also I want an additional column that you can enter extra time that you may have spent for the day i.e. extra 1 hour and this gets added to the calculation. There is other factors in the attachment that needs calculating. Please look into these also ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows? (depending on the nature? of the deliverables): a)? For web sites or? other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software? installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform windows