Hey guys,
I'm curious how you go about logging hours for update work. I have been inserting it in Excel and then manually adding up the hours. Is there a better way to do this? Does anyone know of an excel equation for this? I am running into problems where I work a bit part of the day get a phone call later that day to add new information. It makes for a messy document

I have seen that you can purchase something of the ilk online but not sure if its really necessary or worth it.
Any advice?