Проблема с подсчетами суммы в цикле, поможете решить?

$sum_counter = ['total_sum' => 0];
        foreach ($few_itteartion as $itearator_key => $some_ar) {
            
            if (!isset($sum_counter['sum_for_ittaration'][$itearator_key]))
                $sum_counter['sum_for_ittaration'][$itearator_key] = 0;

            foreach ($some_ar as $v) {
                $sum_counter['total_sum'] += $v['sum'];
                $sum_counter['sum_for_ittaration'][$itearator_key]  += $v['sum'];

            }
        }