Create a new data type for what you want in the tool tip:
var data = new google.visualization.DataTable();
data.addColumn( string , Game );
data.addColumn( number , Transactions );
data.addColumn({type: string , role: tooltip }); // here is the tooltip line
Now add the info that you want in your tooltip to you data:
[ $FormatedWeekday , $SalesAll, $ToolTip ]
[ $FormatedWeekday , $SalesAll, $ToolTip ]
[ $FormatedWeekday , $SalesAll, $ToolTip ]
You will loose all the default data in your toll tip so you might want you re-package it:
$ToolTip = .$FormatedWeekday. u000Du000A .$SalesAll. u000Du000A ."Red Cross Event";
the "u000Du000A" forces a line break