data.addColumn(ColumnType.NUMBER, "Sold Pencils");
data.addColumn(ColumnType.STRING, "title1");
data.addColumn(ColumnType.STRING, "text1");
data.addColumn(ColumnType.NUMBER, "Sold Pens");
data.addColumn(ColumnType.STRING, "title2");
data.addColumn(ColumnType.STRING, "text2");
data.addRows(6);
try {
data.setValue(0, 0, new Date(year = 2008 - 1900, month = 1, day = 1));
data.setValue(1, 0, new Date(year = 2008 - 1900, month = 1, day = 2));
data.setValue(2, 0, new Date(year = 2008 - 1900, month = 1, day = 3));