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.tex file checkins for credit at meeting and review if anybody wants to.

Ranges specify rectangles of various shapes in the spreadsheet, just
as ranges do in traditional spreadsheets. Exmples of legitimate
ranges: 

\begin{itemize}

\item \textbf{*} - all rows, all columns 
\item \textbf{B*} - all rows in column B 
\item \textbf{*5} - all columns in row 5 
\item \textbf{C5..F25} - all cells in the rectangle between C5 and F25

\end{itemize}

Many functions accept ranges. For example, \&SUM(``d*'') will add 
up all cells in column d.