Update calculator.py

calculator.py

@@ -121,7 +121,7 @@ else:
     col_logo, col_title = st.columns([1, 4])
     with col_logo:
         try:
-            st.image("buma ina.PNG", width=150)
+            st.image("buma ina.png", width=150)
         except FileNotFoundError:
             st.warning("⚠️ File logo 'buma_ina.PNG' tidak ditemukan. Silakan pastikan file ada di direktori yang sama dengan script.")
     with col_title:
@@ -253,10 +253,21 @@ else:
         if len(tail) < 5:
             st.warning(f"Hanya {len(tail)} titik data (<= {batas} jam).")
         return tail['fuel_rate_act'].mean()
+    
+    def fuel_awal_setelah_replacement(df, batas):
+        tmp = df[['comp_life', 'fuel_rate_act']].dropna().sort_values('comp_life')
+        tmp = tmp[tmp['comp_life'] <= batas]
+        if tmp.empty:
+            return 0
+        head = tmp.head(5)
+        if len(head) < 5:
+            st.warning(f"Hanya {len(head)} titik data (<= {batas} jam).")
+        return head['fuel_rate_act'].mean()
 
     st.subheader("⛽ Prediksi Fuel Rate")
     avg_blowby_awal = fuel_awal_data(unit_df, current_life)
     avg_blowby_akhir = hitung_avg_blowby(unit_df, extended_life)
+    fuel_setelah_replacement =fuel_awal_setelah_replacement(unit_df, extended_life)
     delta_life = extended_life - current_life
     fuel_rate_awal = (avg_blowby_awal * 0.004) + 71.86  # L/h
     fuel_rate_akhir = (avg_blowby_akhir * 0.004) + 71.86  # L/h
@@ -275,7 +286,7 @@ else:
     with col4:
         st.markdown(f"""
             <div class="metric-card">
-                <h4 style="color: #34495e;">Fuel Rate Akumulasi</h4>
+                <h4 style="color: #34495e;">Fuel Akumulasi</h4>
                 <p style="font-size: 20px; color: #3498db;">{(fuel_rate_akhir * delta_life):,.2f} L</p>
             </div>
         """, unsafe_allow_html=True)
@@ -310,10 +321,10 @@ else:
 
     st.subheader("💰 Analisis Keuntungan dan Kerugian")
     harga_engine = 110_000  # USD
-    harga_fuel = 0.8  # USD/L
+    harga_fuel = 1  # USD/L
 
-    cost_per_h = harga_engine / 25_000
-    saving = cost_per_h * delta_life
+    cost_per_h = harga_engine / current_life
+    saving = ((cost_per_h * delta_life) + (fuel_setelah_replacement* delta_life))
     fuel_cost = fuel_usage * harga_fuel
     net_savings = fuel_cost - saving