AX report display Stock/Purch/Sales price in report

Hi,

Can anyone help me how to to create a report methods, to display Stock/Purch/Sales price from InventTableModule in report?

Something like:

Display Price InventPurchPrice()
{
return InventTableModule::find(SalesLine.ItemId).Price;

Where Module type=0

}

Please note that I am new in this, so please add as many details as possible. 

Thanks!!