Menjumlahkan Elemen Tertentu Pada Daftar Kamus Python

toko = {
    "A1" : [[1, 5, 20000], [2, 7, 28000], [3, 4, 19000], [4, 6, 25000]],
    "A2" : [[1, 3, 10000], [2, 6, 28000], [3, 5, 25000], [4, 6, 30000]],
    "B1" : [[1, 8, 40000], [2, 5, 28000], [3, 3, 18000], [4, 7, 35000]],
    "B2" : [[1, 9, 38000], [2, 4, 16000], [3, 6, 25000], [4, 3, 13000]]
}
Easy Emu