ireport mearge cells columns

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<rightPen lineWidth="1.0"/> </box> <textElement textAlignment="Center" verticalAlignment="Middle"> <font isBold="true" isItalic="true"/> </textElement> <text><![CDATA[Quarter Sum]]></text> </staticText> </band> </columnHeader> <detail> <band height="20" splitType="Stretch"> <staticText> <reportElement x="300" y="0" width="100" height="20"/> <box> <topPen lineWidth="0.0"/> <leftPen lineWidth="1.0"/> <bottomPen lineWidth="0.0"/> <rightPen lineWidth="1.0"/> </box> <textElement textAlignment="Center" verticalAlignment="Middle"> <font isBold="true" isItalic="true"/> </textElement> <text><![CDATA[]]></text> </staticText> <staticText> <reportElement x="0" y="0" width="100" height="20"/> <box> <topPen lineWidth="0.0"/> <leftPen lineWidth="1.0"/> <bottomPen lineWidth="0.0"/> <rightPen lineWidth="1.0"/> </box> <textElement textAlignment="Center" verticalAlignment="Middle"> <font isBold="true" isItalic="true"/> </textElement> <text><![CDATA[]]></text> </staticText> <textField> <reportElement 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