Excel Functions using Tablet
 

If I "write" a number with a tablet pen, into a cell included in a SUM
function, will that number be added as part of the sum total? How does it
know if the number is in "text" mode or an actual number? What I need to do
is, enter prices, with the tablet's pen, into a column of cells, that will be
added up in another cell, to show me a running estimate, or total as I
"write" in numbers? I cannot find this information anywhere! Any help will be
appreciated. Thank you!