def check_number(item):
    return isinstance(item, (int, float))


def calculate_total_sum(nested_list):
    new_summ = 0
    for i in nested_list:
        if isinstance(i, (list, tuple)):
            new_summ += calculate_total_sum(i)
        elif check_number(i):
            new_summ += i
    return new_summ


def process_data(data, limit):
    if calculate_total_sum(data) <= limit:
        return True
    else:
        print("Превышен лимит")
        return False


print(check_number("u"))
print(process_data(data=(3, 4, 6, 6, 7, (1000, 300)), limit=100))