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ClassPad Operation
  (1) With the stylus, tap the cell where you want the result to appear. 
• In this example, we would tap cell A1. 
  (2) On the [Action] menu, tap [List-Calculation] and then 
[sum] on the sub-menu.
• This inputs the sum function ([sum(]) into the edit box.
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Using the Action Menu
  (3) Use the stylus to drag across the range of data 
cells from A7 to C12 to select them.
• “A7:C12” appears to the right of the open parenthesis 
of the [sum] function.