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[]
["Сумма по полю Сколько"]
["Дата","Итог"]
["2012-03-13",1750]
["2012-03-14",350]
["2012-03-16",860]
["2012-03-17",1676]
["Общий итог",4636]

{"sheet":"Лист1","index":1,"n_rows":11,"n_cols":2,"rows_kept":11,"cut":false,"hidden":false,"merged":[]}
["Дата","Сколько"]
["2012-03-13",700]
["2012-03-13",650]
["2012-03-13",400]
["2012-03-14",350]
["2012-03-16",570]
["2012-03-16",290]
["2012-03-17",555]
["2012-03-17",447]
["2012-03-17",436]
["2012-03-17",238]