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[]
[null,"Rok","Miesiąc ","Sprzedaż"]
[null,2019,"Styczeń ",2110]
[null,2019,"Luty",1570]
[null,2019,"Marzec",2040]
[null,2019,"Kwiecień",2670]
[null,2019,"Maj",1480]
[null,2019,"Czerwiec",1450]
[null,2019,"Lipiec",1790]
[null,2019,"Sierpień",1200,null,null,null,null,null,null,null,null," "]
[null,2019,"Wrzesień",2480]
[null,2019,"Październik",1830]
[null,2019,"Listopad",1610]
[null,2019,"Grudzień",2090]

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[]
[null,"Rok","Miesiąc ","Sprzedaż",null,"Rok","Miesiąc ","Sprzedaż"]
[null,2019,"Styczeń ",2110,null,2020,"Styczeń ",2040]
[null,2019,"Luty",1570,null,2020,"Luty",2670]
[null,2019,"Marzec",2040,null,2020,"Marzec",1480]
[null,2019,"Kwiecień",2670,null,2020,"Kwiecień",1450]
[null,2019,"Maj",1480,null,2020,"Maj",1790]
[null,2019,"Czerwiec",1450,null,2020,"Czerwiec",2110]
[null,2019,"Lipiec",1790,null,2020,"Lipiec",1570]
[null,2019,"Sierpień",1200,null,2020,"Sierpień",2040]
[null,2019,"Wrzesień",2480,null,2020,"Wrzesień",2670]
[null,2019,"Październik",1830,null,2020,"Październik",1480]
[null,2019,"Listopad",1610,null,2020,"Listopad",1450]
[null,2019,"Grudzień",2090,null,2020,"Grudzień",1790]