Auto Sum of Machine Downtime

Hello all, I have attached a file I have started in Excel, its purpose is so the head of the Maintenence Dept here can keep up with the weekly and Monthly Downtime of a single machine, im not very skilled at Excel at this point so I was hoping one of you could help me out. I would like a simple way to set the date,machine id, downtime for entire month and ive left room so I can add a description of each machine. Thankx for any help.