Hi, I wonder if anyone could help with a query I have around data input.

I'm working on spreadsheets recording stats we receive daily, calculating
the totals on a calculator and then overwriting the existing number. For
example, if the cell shows '200' and our daily feed brings out an increase of
45, I am manually entering '245'.

I know it is possible to enter the data by formula, so instead of overtyping
'245' I have been entering '=200+45'. What I would like to know is if there
is a way of simply entering '45' into the cell and have excel automatically
add it to what number is already there. Is it possible to do this?

Thanks in advance for any advice!