diff --git a/dzien_05/.~lock.arkusz.xlsx# b/dzien_05/.~lock.arkusz.xlsx#
new file mode 100644
index 0000000..b0051a9
--- /dev/null
+++ b/dzien_05/.~lock.arkusz.xlsx#
@@ -0,0 +1 @@
+,adasiek,tuxedo-os-2026,19.12.2025 14:15,/home/adasiek/.local/share/onlyoffice;
\ No newline at end of file
diff --git a/dzien_05/arkusz.xlsx b/dzien_05/arkusz.xlsx
new file mode 100644
index 0000000..8d1a7c7
Binary files /dev/null and b/dzien_05/arkusz.xlsx differ
diff --git a/dzien_05/df_xlsx.py b/dzien_05/df_xlsx.py
new file mode 100644
index 0000000..0c1ad75
--- /dev/null
+++ b/dzien_05/df_xlsx.py
@@ -0,0 +1,9 @@
+import pandas as pd
+# ImportError: Missing optional dependency 'openpyxl'. 
+# Use pip or conda to install openpyxl.
+
+dane = pd.read_excel('/home/adasiek/Nextcloud/05_SZKOLENIA/10_COMARCH/20251215_Python_Nieprogramisci/2025_12_15_python/dzien_05/arkusz.xlsx')
+
+print(dane)
+wynik = dane.loc[dane['instrument'] == 'INVCEEFIZ', 'ilosc'].sum()
+print(wynik)
\ No newline at end of file