Gettting and setting cart Properties

[road2one]

To get cart Properties I use

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foreach ($this->cart->getProducts() as $product){
               echo 'total from Item: '.$product['total'].'<br>';
               echo 'total qty Item: '.$product['quantity'].'<br>';
               echo 'total : '.$subtotal.'<br>';               
               echo 'prod: '.$product['product_id'].'<br>';   
}


that all works great. Now I need to be able to add a product for free to the cart

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$this->cart->add( $freeItem, $qty = 1);

The code above adds the product but I need to set the dollar amount to zero that where I'm stock.
I should be able to add a product with something like

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$this->cart->setProduct(product id,price) or something similar