{"text_format":"3","workbook":"xlsx","n_sheets":3,"sheets":["Sheet1","Sheet2","Sheet3"],"read":"part_unreadable","date_system":"1900"}

{"sheet":"Sheet1","index":0,"n_rows":0,"n_cols":0,"rows_kept":0,"read":"part_unreadable"}

{"sheet":"Sheet2","index":1,"n_rows":31,"n_cols":1,"rows_kept":31}
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[{"$f":"SUM(A1:A30)","v":1306}]

{"sheet":"Sheet3","index":2,"n_rows":0,"n_cols":0,"rows_kept":0}