Accumulating Sum

I am putting together a simple word counter spreadsheet for excel and have included the file. I have everything fine but I want to add a column that shows the sum for each word count block.

To illustrate, I want the Sum Total column to have as E2 the total in C2. Then I want E3 to be C2:C3. E4 to be C2:C4 all the way until its C2:C1000 so as to show the accumulated number of words. Each time I try it though it just starts the formula over again.

I'm sure there is a real simple solution, but I have no idea what it is. Can anyone help? Thank you.