diff --git a/backend/api/v1/modules/a76/items/exports/validators/calculations.py b/backend/api/v1/modules/a76/items/exports/validators/calculations.py
index d5703cd4..f49a195e 100644
--- a/backend/api/v1/modules/a76/items/exports/validators/calculations.py
+++ b/backend/api/v1/modules/a76/items/exports/validators/calculations.py
@@ -239,27 +239,42 @@ def calculate_values(
     if not result:
         return
 
+    if not line.financial or not line.quantity:
+        return
+
     currency, currency_type, exchange_rate = result
     if currency_type in ("USD", "ME"):
         currency = "foreign"
     elif currency_type in ("MXN", "MN"):
         currency = "local"
 
+    # Evitar None * None / NoneType * Decimal al guardar sin cantidad o sin costo capturado
+    qty = (
+        line.quantity.quantity
+        if line.quantity.quantity is not None
+        else Decimal("0")
+    )
+    capture = (
+        line.financial.unit_cost_capture
+        if line.financial.unit_cost_capture is not None
+        else Decimal("0")
+    )
+
     if currency == "foreign":  # ME
-        line.financial.unit_cost_usd = line.financial.unit_cost_capture
-        line.financial.value_usd = line.financial.unit_cost_usd * line.quantity.quantity
-        line.financial.unit_cost_mxn = line.financial.unit_cost_capture * (exchange_rate or 1)
-        line.financial.value_mxn = line.financial.unit_cost_mxn * line.quantity.quantity
-        line.financial.value_mc = line.financial.unit_cost_usd * line.quantity.quantity
+        line.financial.unit_cost_usd = capture
+        line.financial.value_usd = capture * qty
+        line.financial.unit_cost_mxn = capture * (exchange_rate or 1)
+        line.financial.value_mxn = line.financial.unit_cost_mxn * qty
+        line.financial.value_mc = capture * qty
     elif currency == "local":  # MN
-        line.financial.unit_cost_mxn = line.financial.unit_cost_capture
-        line.financial.value_mxn = line.financial.unit_cost_mxn * line.quantity.quantity
-        line.financial.unit_cost_usd = line.financial.unit_cost_capture / (exchange_rate or 1)
-        line.financial.value_usd = line.financial.unit_cost_usd * line.quantity.quantity
-        line.financial.value_mc = line.financial.unit_cost_usd * line.quantity.quantity
+        line.financial.unit_cost_mxn = capture
+        line.financial.value_mxn = line.financial.unit_cost_mxn * qty
+        line.financial.unit_cost_usd = capture / (exchange_rate or 1)
+        line.financial.value_usd = line.financial.unit_cost_usd * qty
+        line.financial.value_mc = line.financial.unit_cost_usd * qty
     elif currency == "manual":  # MC
-        line.financial.unit_cost_usd = line.financial.unit_cost_capture / (exchange_rate or 1)
-        line.financial.value_usd = line.financial.unit_cost_usd * line.quantity.quantity
+        line.financial.unit_cost_usd = capture / (exchange_rate or 1)
+        line.financial.value_usd = line.financial.unit_cost_usd * qty
         line.financial.unit_cost_mxn = line.financial.unit_cost_usd * (exchange_rate or 1)
-        line.financial.value_mxn = line.financial.unit_cost_mxn * line.quantity.quantity
-        line.financial.value_mc = line.financial.unit_cost_capture * line.quantity.quantity
+        line.financial.value_mxn = line.financial.unit_cost_mxn * qty
+        line.financial.value_mc = capture * qty
diff --git a/backend/api/v1/modules/a76/items/exports/validators/update.py b/backend/api/v1/modules/a76/items/exports/validators/update.py
index 2d3e13e9..896f8240 100644
--- a/backend/api/v1/modules/a76/items/exports/validators/update.py
+++ b/backend/api/v1/modules/a76/items/exports/validators/update.py
@@ -98,6 +98,7 @@ def validate_update(
             line.financial.unit_cost_mxn = unit_cost_capture
 
         quantity = line.quantity.quantity if line.quantity.quantity is not None else existing_line.quantity.quantity
+        quantity = quantity if quantity is not None else Decimal("0")
 
         if line.financial.unit_cost_usd is not None:
             line.financial.value_usd = line.financial.unit_cost_usd * quantity
diff --git a/backend/api/v1/modules/a76/items/imports/validators/calculations.py b/backend/api/v1/modules/a76/items/imports/validators/calculations.py
index 8e80ba8c..be6754a0 100644
--- a/backend/api/v1/modules/a76/items/imports/validators/calculations.py
+++ b/backend/api/v1/modules/a76/items/imports/validators/calculations.py
@@ -138,21 +138,32 @@ def calculate_values(
         currency = "local"
     # si currency_type es otro o None, se usa currency tal cual
 
+    qty = (
+        line.quantity.quantity
+        if line.quantity.quantity is not None
+        else Decimal("0")
+    )
+    capture = (
+        line.financial.unit_cost_capture
+        if line.financial.unit_cost_capture is not None
+        else Decimal("0")
+    )
+
     if currency == "foreign":
-        line.financial.unit_cost_usd = line.financial.unit_cost_capture
-        line.financial.value_usd = line.financial.unit_cost_usd * line.quantity.quantity
-        line.financial.unit_cost_mxn = line.financial.unit_cost_capture * (exchange_rate or 1)
-        line.financial.value_mxn = line.financial.unit_cost_mxn * line.quantity.quantity
-        line.financial.value_mc = line.financial.unit_cost_usd * line.quantity.quantity
+        line.financial.unit_cost_usd = capture
+        line.financial.value_usd = capture * qty
+        line.financial.unit_cost_mxn = capture * (exchange_rate or 1)
+        line.financial.value_mxn = line.financial.unit_cost_mxn * qty
+        line.financial.value_mc = capture * qty
     elif currency == "local":
-        line.financial.unit_cost_mxn = line.financial.unit_cost_capture
-        line.financial.value_mxn = line.financial.unit_cost_mxn * line.quantity.quantity
-        line.financial.unit_cost_usd = line.financial.unit_cost_capture / (exchange_rate or 1)
-        line.financial.value_usd = line.financial.unit_cost_usd * line.quantity.quantity
-        line.financial.value_mc = line.financial.unit_cost_usd * line.quantity.quantity
+        line.financial.unit_cost_mxn = capture
+        line.financial.value_mxn = line.financial.unit_cost_mxn * qty
+        line.financial.unit_cost_usd = capture / (exchange_rate or 1)
+        line.financial.value_usd = line.financial.unit_cost_usd * qty
+        line.financial.value_mc = line.financial.unit_cost_usd * qty
     elif currency == "manual":
-        line.financial.unit_cost_usd = line.financial.unit_cost_capture / (exchange_rate or 1)
-        line.financial.value_usd = line.financial.unit_cost_usd * line.quantity.quantity
+        line.financial.unit_cost_usd = capture / (exchange_rate or 1)
+        line.financial.value_usd = line.financial.unit_cost_usd * qty
         line.financial.unit_cost_mxn = line.financial.unit_cost_usd * (exchange_rate or 1)
-        line.financial.value_mxn = line.financial.unit_cost_mxn * line.quantity.quantity
-        line.financial.value_mc = line.financial.unit_cost_capture * line.quantity.quantity
\ No newline at end of file
+        line.financial.value_mxn = line.financial.unit_cost_mxn * qty
+        line.financial.value_mc = capture * qty
\ No newline at end of file
diff --git a/backend/api/v1/modules/a76/items/imports/validators/update.py b/backend/api/v1/modules/a76/items/imports/validators/update.py
index 3f891e0a..ba69b5b4 100644
--- a/backend/api/v1/modules/a76/items/imports/validators/update.py
+++ b/backend/api/v1/modules/a76/items/imports/validators/update.py
@@ -95,6 +95,7 @@ def validate_update(
             line.financial.unit_cost_mxn = unit_cost_capture
 
         quantity = line.quantity.quantity if line.quantity.quantity is not None else existing_line.quantity.quantity
+        quantity = quantity if quantity is not None else Decimal("0")
 
         if line.financial.unit_cost_usd is not None:
             line.financial.value_usd = line.financial.unit_cost_usd * quantity