public function getUnitTax()
    {
        $total = ($this->UnitPrice / 100) * $this->TaxRate;

        $this->extend("updateUnitTax", $total);

        return $total;
    }
public function getUnitTax()
    {
        $total = ($this->UnitPrice / 100) * $this->TaxRate;

        $this->extend("updateUnitTax", $total);

        return $total;
    }
public function getUnitTax ( ) { $ total = ( $ this -> UnitPrice / 100 ) * $ this -> TaxRate ; $ this -> extend ( "updateUnitTax" , $ total ) ; return $ total ; }
Get the amount of tax for a single unit of this item

@return float
Get the amount of tax for a single unit of this item