Update app.py

app.py

@@ -133,11 +133,14 @@ if not filtered_df.empty:
     fig_year_trend = px.line(year_trend, x='Year', y='Net Sales Value', title='Year-over-Year Sales Trend')
     st.plotly_chart(fig_year_trend)
 
-    # Visualization 4: Profit and Loss Overview (Simple Table)
-    st.subheader("Profit and Loss Overview")
-    pnl_data = filtered_df[['Customer Name', 'Product Name', 'Net Sales Value', 'Cost', 'Net Sales Value - Cost']]
-    pnl_data.columns = ['Customer', 'Product', 'Sales', 'Cost', 'Profit']
-    st.dataframe(pnl_data)
+     Add 'Net Sales Value - Cost' as a new column
+     filtered_df['Net Sales Value - Cost'] = filtered_df['Net Sales Value'] - filtered_df['Cost']
+
+   # Visualization 4: Profit and Loss Overview (Simple Table)
+   st.subheader("Profit and Loss Overview")
+   pnl_data = filtered_df[['Customer Name', 'Product Name', 'Net Sales Value', 'Cost', 'Net Sales Value - Cost']]
+   pnl_data.columns = ['Customer', 'Product', 'Sales', 'Cost', 'Profit']
+   st.dataframe(pnl_data)
     
     # Visualization 5: Gross Margin Distribution (Pie chart)
     st.subheader("Gross Margin Distribution")