diff --git a/dist/Programa Caja.jar b/dist/Programa Caja.jar
index 99f313f..281554d 100644
Binary files a/dist/Programa Caja.jar and b/dist/Programa Caja.jar differ
diff --git a/src/danielcortes/xyz/models/calculo_fondo/CalculoFondoDAO.java b/src/danielcortes/xyz/models/calculo_fondo/CalculoFondoDAO.java
index 5f352e4..4d5f954 100644
--- a/src/danielcortes/xyz/models/calculo_fondo/CalculoFondoDAO.java
+++ b/src/danielcortes/xyz/models/calculo_fondo/CalculoFondoDAO.java
@@ -24,51 +24,23 @@
 
 package danielcortes.xyz.models.calculo_fondo;
 
-import danielcortes.xyz.data.ConnectionHolder;
 import danielcortes.xyz.models.caja.Caja;
-import danielcortes.xyz.models.caja.SQLiteCajaDAO;
-import java.sql.ResultSet;
-import java.sql.SQLException;
-import java.util.ArrayList;
 import java.util.List;
-import java.util.logging.Level;
-import java.util.logging.Logger;
 
-public abstract class CalculoFondoDAO {
+public interface CalculoFondoDAO {
 
-  private static final Logger LOGGER = Logger.getLogger(CalculoFondoDAO.class.getName());
+  List<CalculoFondo> findAll();
 
-  protected ConnectionHolder connectionHolder;
+  List<CalculoFondo> findByCaja(Caja caja);
 
-  public abstract List<CalculoFondo> findAll();
+  CalculoFondo findById(int id);
 
-  public abstract List<CalculoFondo> findByCaja(Caja caja);
+  boolean insertCalculoFondo(CalculoFondo calculoFondo);
 
-  public abstract CalculoFondo findById(int id);
+  boolean updateCalculoFondo(CalculoFondo calculoFondo);
 
-  public abstract boolean insertCalculoFondo(CalculoFondo calculoFondo);
+  boolean deleteCalculoFondo(CalculoFondo calculoFondo);
 
-  public abstract boolean updateCalculoFondo(CalculoFondo calculoFondo);
+  int getTotalCalculoFondo(Caja caja);
 
-  public abstract boolean deleteCalculoFondo(CalculoFondo calculoFondo);
-
-  public abstract int getTotalCalculoFondo(Caja caja);
-
-  protected List<CalculoFondo> calculoFondoFromResultSet(ResultSet rs) throws SQLException {
-    List<CalculoFondo> calculoFondoList = new ArrayList<>();
-    while (rs.next()) {
-      int caja_id = rs.getInt("caja_id");
-      Caja caja = new SQLiteCajaDAO().getById(caja_id).get();
-      CalculoFondo calculoFondo = new CalculoFondo();
-      calculoFondo.setId(rs.getInt("id"));
-      calculoFondo.setValor(rs.getInt("valor"));
-      calculoFondo.setDescripcion(rs.getString("descripcion"));
-      calculoFondo.setCaja(caja);
-      calculoFondoList.add(calculoFondo);
-
-      LOGGER.log(Level.FINER, "Se a creo: {0}", calculoFondo);
-
-    }
-    return calculoFondoList;
-  }
 }
diff --git a/src/danielcortes/xyz/models/calculo_fondo/SQLiteCalculoFondoDAO.java b/src/danielcortes/xyz/models/calculo_fondo/SQLiteCalculoFondoDAO.java
index 06df325..26aeca6 100644
--- a/src/danielcortes/xyz/models/calculo_fondo/SQLiteCalculoFondoDAO.java
+++ b/src/danielcortes/xyz/models/calculo_fondo/SQLiteCalculoFondoDAO.java
@@ -24,6 +24,8 @@
 
 package danielcortes.xyz.models.calculo_fondo;
 
+import danielcortes.xyz.data.ConnectionHolder;
+import danielcortes.xyz.data.DAOManager;
 import danielcortes.xyz.data.SQLiteConnectionHolder;
 import danielcortes.xyz.models.caja.Caja;
 import java.sql.Connection;
@@ -35,10 +37,12 @@ import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
 
-public class SQLiteCalculoFondoDAO extends CalculoFondoDAO {
+public class SQLiteCalculoFondoDAO implements CalculoFondoDAO {
 
   private static final Logger LOGGER = Logger.getLogger(SQLiteCalculoFondoDAO.class.getName());
 
+  private ConnectionHolder connectionHolder;
+
   public SQLiteCalculoFondoDAO() {
     this.connectionHolder = new SQLiteConnectionHolder();
   }
@@ -52,6 +56,7 @@ public class SQLiteCalculoFondoDAO extends CalculoFondoDAO {
         try (ResultSet rs = ps.executeQuery()) {
           LOGGER.log(Level.FINE, "QUERY: {0}", query);
 
+
           calculoFondoList = this.calculoFondoFromResultSet(rs);
         }
       }
@@ -202,4 +207,22 @@ public class SQLiteCalculoFondoDAO extends CalculoFondoDAO {
     }
     return sum;
   }
+
+  protected List<CalculoFondo> calculoFondoFromResultSet(ResultSet rs) throws SQLException {
+    List<CalculoFondo> calculoFondoList = new ArrayList<>();
+    while (rs.next()) {
+      int caja_id = rs.getInt("caja_id");
+      Caja caja = DAOManager.getCajaDAO().getById(caja_id).get();
+      CalculoFondo calculoFondo = new CalculoFondo();
+      calculoFondo.setId(rs.getInt("id"));
+      calculoFondo.setValor(rs.getInt("valor"));
+      calculoFondo.setDescripcion(rs.getString("descripcion"));
+      calculoFondo.setCaja(caja);
+      calculoFondoList.add(calculoFondo);
+
+      LOGGER.log(Level.FINER, "Se a creo: {0}", calculoFondo);
+
+    }
+    return calculoFondoList;
+  }
 }