I haven't tested this, but I suspect changing this:
Code:
$this->products_ordered .= $this->products[$i]['qty'] . ' x ' . $this->products[$i]['name'] . ($this->products[$i]['model'] != '' ? ' (' . $this->products[$i]['model'] . ') ' : '') . ' = ' .
to this:
Code:
$this->products_ordered .= $this->products[$i]['qty'] . ' x ' . $this->products[$i]['name'] . ($this->products[$i]['model'] != '' ? ' (' . $this->products[$i]['model'] . ') ' : '') . ' @ ' . $currencies->display_price($this->products[$i]['final_price'], $this->products[$i]['tax'], 1) . ' = ' .
may be enough