{
    "Prkna": {
        "Prkna 2/15/300 JCH": {
            "rozmery": "2/15/300",
            "cena": 100,
            "mj": "m3"
        },
        "Prkna 2/15/400": {
            "rozmery": "2/15/400",
            "cena": 110,
            "mj": "m3"
        },
        "Prkna 2/15/500": {
            "rozmery": "2/15/500",
            "cena": 120,
            "mj": "m3"
        }
    },
    "Palubky": {
        "palubky 2/14/400": {
            "rozmery": "2/14/400",
            "cena": 200,
            "mj": "m3"
        },
        "palubky 2/14/500": {
            "rozmery": "2/14/500",
            "cena": 210,
            "mj": "m3"
        }
    },
    "Hranoly": {
        "hranol 20/20/200": {
            "rozmery": "20/20/200",
            "cena": 300,
            "mj": "m3"
        },
        "hranol 25/25/200": {
            "rozmery": "25/25/200",
            "cena": 310,
            "mj": "m3"
        }
    }
}