I am writing a excel document containing large amounts of data. Excel is currently giving me a hard time with automaticly sum the cells in each row. For exampel:

A B C D E F
1 2 3 4 5 15

I want column F to always autosum column A - E, without having to press autosum for each row. Summing several rows at a time doesn't work either as I have to check that the sum after each row is correct as I enter them.

Thanks in advance