Magento – How to add extra fields in products ordered report

magento-1.7reports

We want to show extra fields in products ordered report. Extra fields are sku, cost_price(new attribute) and sold price(price)

I have found following class which handle this.

Mage_Adminhtml_Block_Report_Product_Sold_Grid

And also I found following controller class which handle this.

Mage_Adminhtml_Report_ProductController

I was failed to full fill this requirement. Can anyone help me on this?
Thanks.

Open app\code\core\Mage\Adminhtml\Block\Report\Product\Sold\Grid.php and put the below code in _prepareColumns() function

You can move Grid.php in your local folder as well.

$this->addColumn('sku', array(
    'header'    => Mage::helper('reports')->__('Product Sku'),
    'index'     =>'sku'
));