diff --git a/months.cls b/months.cls
index d140f9c..fbf3496 100644
--- a/months.cls
+++ b/months.cls
@@ -23,15 +23,10 @@ Private jtext() As Variant
 Private basejson As Object
 
 
-Private Sub Worksheet_Activate()
-
-    Call Me.load_sheet
-
-End Sub
 
 Private Sub Worksheet_Change(ByVal target As Range)
 
-    Application.Calculation = xlCalculationManual
+    
     If Not dumping Then
 
         If Not Intersect(target, Range("E6:E17")) Is Nothing Then Call Me.mvp_adj
@@ -44,13 +39,10 @@ Private Sub Worksheet_Change(ByVal target As Range)
     End If
     
     'Call Me.set_format
-    Application.Calculation = xlCalculationAutomatic
     
 
 End Sub
 
-
-
 Sub mvp_set()
 
     Dim i As Integer
@@ -63,6 +55,7 @@ Sub mvp_set()
         price(i, 4) = price(i, 5) - (price(i, 2) + price(i, 3))
         sales(i, 5) = units(i, 5) * price(i, 5)
         sales(i, 4) = sales(i, 5) - (sales(i, 2) + sales(i, 3))
+        Call Me.build_json(i)
     Next i
     
     Me.crunch_array
@@ -83,6 +76,7 @@ Sub mvp_adj()
         price(i, 5) = price(i, 4) + (price(i, 2) + price(i, 3))
         sales(i, 5) = units(i, 5) * price(i, 5)
         sales(i, 4) = sales(i, 5) - (sales(i, 2) + sales(i, 3))
+        Call Me.build_json(i)
     Next i
     
     Me.crunch_array
@@ -126,12 +120,20 @@ End Sub
 
 Sub set_sheet()
 
-    dumping = True
+    Dim i As Integer
 
+    dumping = True
+    
     Range("B6:F17") = units
     Range("H6:L17") = price
     Range("N6:R17") = sales
+    Range("B18:F18").FormulaR1C1 = tunits
+    Range("H18:L18").FormulaR1C1 = tprice
+    Range("N18:R18").FormulaR1C1 = tsales
     
+    For i = 1 To 12
+        Sheets("_month").Cells(i + 1, 16) = JsonConverter.ConvertToJson(adjust(i))
+    Next i
     dumping = False
     
 End Sub
@@ -141,7 +143,12 @@ Sub load_sheet()
     units = Sheets("_month").Range("A2:E13").FormulaR1C1
     price = Sheets("_month").Range("F2:J13").FormulaR1C1
     sales = Sheets("_month").Range("K2:O13").FormulaR1C1
-   
+    tunits = Range("B18:F18")
+    tprice = Range("H18:L18")
+    tsales = Range("N18:R18")
+    ReDim adjust(12)
+    Me.crunch_array
+    Me.set_sheet
 
 End Sub
 
@@ -265,12 +272,32 @@ End Sub
 
 Sub build_json(ByVal pos As Integer)
 
-    'if there is no existing volume on the target month
-    If units(pos, 2) + units(pos, 3) = 0 Then
-        'add month
-        If price(pos, 4) = 0 Then
-            'if the target price is diferent from the average
-            adjust(pos)("type") = "addmonth_vd"
+    'if something is changing
+    If Round(units(pos, 4), 2) <> 0 Or Round(price(pos, 4), 8) <> 0 Or Round(sales(pos, 4), 8) <> 0 Then
+        Set adjust(pos) = basejson
+        'if there is no existing volume on the target month but units are being added
+        If units(pos, 2) + units(pos, 3) = 0 And units(pos, 4) <> 0 Then
+            'add month
+            If Round(price(pos, 5), 8) <> Round(tprice(1, 2) + tprice(1, 3), 8) Then
+                'if the target price is diferent from the average and a month is being added
+                adjust(pos)("type") = "addmonth_vp"
+            Else
+                'if the target price is the same as average and a month is being added
+                adjust(pos)("type") = "addmonth_v"
+            End If
+            adjust(pos)("qty") = units(pos, 4)
+            adjust(pos)("amount") = sales(pos, 4)
+        Else
+            'scale the existing volume(price) on the target month
+            If Round(price(pos, 4), 8) <> 0 Then
+                'if the target price is diferent from the average and a month is being added
+                adjust(pos)("type") = "scale_vp"
+            Else
+                'if the target price is the same as average and a month is being added
+                adjust(pos)("type") = "scale_v"
+            End If
+            adjust(pos)("qty") = units(pos, 4)
+            adjust(pos)("amount") = sales(pos, 4)
         End If
     End If
 
@@ -279,6 +306,7 @@ End Sub
 Sub crunch_array()
 
     Dim i As Integer
+    Dim j As Integer
     
     For i = 1 To 5
         tunits(1, i) = 0
@@ -287,20 +315,22 @@ Sub crunch_array()
     Next i
     
     For i = 1 To 12
-        tunits(1, 1) = tunits(1, 1) + units(i, 1)
-        tsales(1, 1) = tsales(1, 1) + sales(i, 1)
+        For j = 1 To 5
+            tunits(1, j) = tunits(1, j) + units(i, j)
+            tsales(1, j) = tsales(1, j) + sales(i, j)
+        Next j
     Next i
     
     'prior
     tprice(1, 1) = tsales(1, 1) / tunits(1, 1)
     'base
-    tprice(2, 1) = tsales(2, 1) / tunits(2, 1)
+    tprice(1, 2) = tsales(1, 2) / tunits(1, 2)
     'forecast
-    tprice(5, 1) = tsales(5, 1) / tunits(5, 1)
+    tprice(1, 5) = tsales(1, 5) / tunits(1, 5)
     'adjust
-    tprice(3, 1) = (tsales(2, 1) + tsales(3, 1)) / (tunits(2, 1) + tunits(3, 1)) - tprice(2, 1)
+    tprice(1, 3) = (tsales(1, 2) + tsales(1, 3)) / (tunits(1, 2) + tunits(1, 3)) - tprice(1, 2)
     'current adjust
-    tprice(4, 1) = tprice(5, 1) - (tprice(2, 1) + tprice(3, 1))
+    tprice(1, 4) = tprice(1, 5) - (tprice(1, 2) + tprice(1, 3))
     
 
 End Sub