diff --git a/paymentLogs/Domain/Payment.cs b/paymentLogs/Domain/Payment.cs
index 59d2acf..8474cd4 100644
--- a/paymentLogs/Domain/Payment.cs
+++ b/paymentLogs/Domain/Payment.cs
@@ -13,6 +13,5 @@ namespace PaymentLogs.Domain
         public int CourseId { get; set; }
         public int CoursePrice { get; set; }
         public int Paid { get; set; }
-        public int Debt {  get; set; }
     }
 }
diff --git a/paymentLogs/Forms/DataForm.cs b/paymentLogs/Forms/DataForm.cs
index c883f16..bb83d8d 100644
--- a/paymentLogs/Forms/DataForm.cs
+++ b/paymentLogs/Forms/DataForm.cs
@@ -33,6 +33,7 @@ namespace PaymentLogs
             dataGridView1.Columns.Add("course_price", "Цена");
             dataGridView1.Columns.Add("paid", "Оплачено");
             dataGridView1.Columns.Add("debt", "Долг");
+            dataGridView1.Columns["debt"].ReadOnly = true;
             foreach (Payment payment in Program.PaymentRepository.All())
             {
                 if(payment.CourseId != _course.Id)
@@ -40,7 +41,7 @@ namespace PaymentLogs
                     continue;
                 }
                 dataGridView1.Rows.Add(payment.Id.ToString(), payment.FCs.ToString(), Program.CourseRepository.Get(payment.CourseId).Name,
-                    payment.CoursePrice.ToString(), payment.Paid.ToString(), payment.Debt.ToString());
+                    payment.CoursePrice.ToString(), payment.Paid.ToString(), (payment.CoursePrice - payment.Paid).ToString() );
             }
         }
 
@@ -58,6 +59,7 @@ namespace PaymentLogs
 
         private void toolStripButton2_Click(object sender, EventArgs e)
         {
+            this.ActiveControl = null;
             foreach (DataGridViewRow row in dataGridView1.Rows)
             {
                 try
@@ -70,8 +72,7 @@ namespace PaymentLogs
                             FCs = row.Cells["fcs"].Value.ToString(),
                             CourseId = Program.CourseRepository.ByName(row.Cells["course"].Value.ToString()).Id,
                             CoursePrice = Convert.ToInt32(row.Cells["course_price"].Value),
-                            Paid = Convert.ToInt32(row.Cells["paid"].Value),
-                            Debt = Convert.ToInt32(row.Cells["debt"].Value)
+                            Paid = Convert.ToInt32(row.Cells["paid"].Value)
                         };
                         Program.PaymentRepository.Update(payment.Id, payment);
                     }
@@ -109,7 +110,9 @@ namespace PaymentLogs
                         List<string> list =  new List<string> 
                         { row.Cells["id"].Value.ToString(), row.Cells["fcs"].Value.ToString(), 
                             row.Cells["course"].Value.ToString(), row.Cells["course_price"].Value.ToString(),
-                            row.Cells["paid"].Value.ToString(), row.Cells["debt"].Value.ToString() };
+                            row.Cells["paid"].Value.ToString(), 
+                            (Convert.ToInt32(row.Cells["course_price"].Value.ToString()) - (Convert.ToInt32(row.Cells["paid"])))
+                            .ToString() };
                         
                         filtredList.Add(list);
                     }
diff --git a/paymentLogs/Repositories/PaymentRepo.cs b/paymentLogs/Repositories/PaymentRepo.cs
index c3c0b3c..cc9747a 100644
--- a/paymentLogs/Repositories/PaymentRepo.cs
+++ b/paymentLogs/Repositories/PaymentRepo.cs
@@ -29,8 +29,7 @@ namespace PaymentLogs.Repositories
                     FCs = reader.GetString("fcs"),
                     CourseId = reader.GetInt32("course_id"),
                     CoursePrice = reader.GetInt32("course_price"),
-                    Paid = reader.GetInt32("paid"),
-                    Debt = reader.GetInt32("debt")
+                    Paid = reader.GetInt32("paid")
                 };
                 _data[payment.Id] = payment;
 
@@ -45,10 +44,10 @@ namespace PaymentLogs.Repositories
             db.openConnection();
             foreach(Payment payment in _data.Values)
             {
-                string sql = $" INSERT INTO `payments` (`id`, `fcs`, `course_id`, `course_price`, `paid`, `debt`) " +
-                    $"VALUES ('{payment.Id}','{payment.FCs}', '{payment.CourseId}', '{payment.CoursePrice}', '{payment.Paid}', '{payment.Debt}') " +
+                string sql = $" INSERT INTO `payments` (`id`, `fcs`, `course_id`, `course_price`, `paid`) " +
+                    $"VALUES ('{payment.Id}','{payment.FCs}', '{payment.CourseId}', '{payment.CoursePrice}', '{payment.Paid}') " +
                     $"ON DUPLICATE KEY UPDATE `fcs`='{payment.FCs}', `course_id`='{payment.CourseId}', `course_price` = '{payment.CoursePrice}', " +
-                    $"`paid` = '{payment.Paid}', `debt`='{payment.Debt}'";
+                    $"`paid` = '{payment.Paid}'";
                 MySqlCommand cmd = new MySqlCommand(sql, db.getConnection());
                 cmd.ExecuteNonQuery();