$prices = [
    1560 => [
        'valid_from' => '2000-01-01',
        'valid_to' => '2015-12-31',
        'prices' => [
            'original' => 30,
            'recommended' => 39,
            'without_vat' => 25,
        ]
    ],
    2380 => [
        'valid_from' => '2010-01-01',
        'valid_to' => '2015-12-31',
        'prices' => [
            'original' => 150,
            'recommended' => 170,
            'without_vat' => 135,
        ]
    ],
];