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Required information

$[$The following information applies to the questions displayed below.$]$

George bought the following amounts of Stock A over the years:

Note: Loss amounts should be indicated with a minus sign.

$\backslash$table$[[,\backslash$table$[[$Date$],[$Purchased$]],\backslash$table$[[$Number of$],[$Shares$]],\backslash$table$[[$Adjusted$],[$Basis$]]],[$Stock A$,\frac{11}{21}\frac{?}{1997},1,150,$$$27,600$