diff --git a/fpvt.frm b/fpvt.frm
index 3fc3b4e..1320359 100644
--- a/fpvt.frm
+++ b/fpvt.frm
@@ -30,15 +30,6 @@ Private Sub cbCancel_Click()
 End Sub
 
 
-Private Sub chbPlug_Change()
-
-        opvolume.Enabled = Not chbPlug.value
-        opprice.Enabled = Not chbPlug.value
-
-End Sub
-
-
-
 Private Sub butAdjust_Click()
     MsgBox ("adjustment posted")
     Me.Hide
@@ -48,6 +39,8 @@ Private Sub butCancel_Click()
     Me.Hide
 End Sub
 
+
+
 Private Sub lbMonth_Change()
     
     Dim i As Long
@@ -139,6 +132,56 @@ Private Sub opEditVol_Click()
     tbFcVol.BackColor = &H80000018
 End Sub
 
+Private Sub opEditPriceM_Click()
+    opmvol.Enabled = False
+    opmprice.Enabled = False
+    opmvol.Visible = False
+    opmprice.Visible = False
+    opmprice.value = True
+    opmvol.value = False
+    
+    tbMFPrice.Enabled = True
+    tbMFPrice.BackColor = &H80000018
+    tbMFVal.Enabled = False
+    tbMFVal.BackColor = &H80000005
+    tbMFVol.Enabled = False
+    tbMFVol.BackColor = &H80000005
+    
+End Sub
+
+Private Sub opEditSalesM_Click()
+    opmvol.Enabled = True
+    opmprice.Enabled = True
+    opmvol.Visible = True
+    opmprice.Visible = True
+    
+    tbMFPrice.Enabled = False
+    tbMFPrice.BackColor = &H80000005
+    tbMFVal.Enabled = True
+    tbMFVal.BackColor = &H80000018
+    tbMFVol.Enabled = False
+    tbMFVol.BackColor = &H80000005
+    
+End Sub
+
+Private Sub opEditVolM_Click()
+    opmvol.Enabled = False
+    opmprice.Enabled = False
+    opmprice.value = False
+    opmvol.value = True
+    opmvol.Enabled = False
+    opmprice.Enabled = False
+    opmvol.Visible = False
+    opmprice.Visible = False
+    
+    tbMFPrice.Enabled = False
+    tbMFPrice.BackColor = &H80000005
+    tbMFVal.Enabled = False
+    tbMFVal.BackColor = &H80000005
+    tbMFVol.Enabled = True
+    tbMFVol.BackColor = &H80000018
+End Sub
+
 Private Sub opPlugPrice_Click()
     calc_val
 End Sub
@@ -219,7 +262,6 @@ Private Sub UserForm_Activate()
         month(i, 6) = Format(sp("package")("mpvt")(i)("2020 base value_usd"), "#,###")
         month(i, 7) = Format(sp("package")("mpvt")(i)("2020 adj value_usd"), "#,###")
         month(i, 8) = Format(sp("package")("mpvt")(i)("2020 tot value_usd"), "#,###")
-        
     Next i
     
     
@@ -302,7 +344,7 @@ Sub calc_val()
     adjust("user") = Application.UserName
     
     'print json
-    tbJSON = JsonConverter.ConvertToJson(adjust)
+    'tbJSON = JsonConverter.ConvertToJson(adjust)
 
 End Sub
 
@@ -345,3 +387,69 @@ Sub calc_price()
 End Sub
 
 
+Sub calc_mval()
+
+    Dim pchange As Double
+    
+    If IsNumeric(tbFcVal.value) Then
+        'calculate percent change
+        pchange = CDbl(tbFcVal.value) / (CDbl(tbPadjVal.value) + CDbl(tbBaseVal.value))
+        
+        'plug the adjustment required
+        tbAdjVal = Format(CDbl(tbFcVal.value) - CDbl(tbBaseVal.value) - CDbl(tbPadjVal.value), "#,###")
+        
+        
+        '---------if volume adjustment method is selected, scale the volume up----------------------------------
+        If opPlugVol Then
+            tbFcVol = Format((CDbl(tbPadjVol.value) + CDbl(tbBaseVol.value)) * pchange, "#,###")
+        Else
+            tbFcVol = Format((CDbl(tbPadjVol.value) + CDbl(tbBaseVol.value)), "#,###")
+        End If
+        tbFcPrice = Format(CDbl(tbFcVal.value) / CDbl(tbFcVol.value), "#.000")
+        tbAdjVol = Format(tbFcVol - (CDbl(tbBaseVol) + CDbl(tbPadjVol)), "#,###")
+        tbAdjPrice = Format(CDbl(tbFcVal.value) / CDbl(tbFcVol.value) - ((CDbl(tbBaseVal.value) + CDbl(tbPadjVal.value)) / (CDbl(tbBaseVol.value) + CDbl(tbPadjVol.value))), "#.000")
+    Else
+        'tbFcVal = Format(CDbl(tbPadjVal.value) + CDbl(tbBaseVal.value), "#,###")
+        tbAdjVol = Format((CDbl(tbFcVol.value) - CDbl(tbBaseVol.value) - CDbl(tbPadjVol.value)), "#,###")
+        tbAdjPrice = 0
+        'tbAdjPrice = Format(CDbl(tbFcVal.value) / CDbl(tbFcVol.value) - ((tbBaseVal + tbPadjVal) / (tbBaseVol + tbPadjVol)), "#.000")
+    End If
+End Sub
+
+Sub calc_mprice()
+
+    If IsNumeric(tbFcPrice.value) And tbFcPrice.value <> 0 Then
+        tbFcVal = Format(CDbl(tbFcPrice.value) * CDbl(tbFcVol.value), "#,###")
+        tbAdjVal = Format(CDbl(tbFcVal.value) - CDbl(tbBaseVal.value) - CDbl(tbPadjVal.value), "#,###")
+        tbAdjPrice = Format(CDbl(tbFcVal.value) / CDbl(tbFcVol.value) - ((CDbl(tbBaseVal.value) + CDbl(tbPadjVal.value)) / (CDbl(tbBaseVol.value) + CDbl(tbPadjVol.value))), "#.000")
+    Else
+        tbFcVal = 0
+        tbAdjVal = Format(CDbl(tbFcVal.value) - CDbl(tbBaseVal.value) - CDbl(tbPadjVal.value), "#,###")
+    End If
+    
+End Sub
+
+Sub calc_mvol()
+
+    Dim pchange As Double
+    
+    If IsNumeric(tbFcVol.value) And tbFcVol <> 0 Then
+        'price should already have been re-calculated to base + prior at this point
+        tbFcVal = Format(CDbl(tbFcPrice.value) * CDbl(tbFcVol.value))
+    
+        'calculate percent change
+        'pchange = CDbl(tbFcVal.value) / (CDbl(tbPadjVal.value) + CDbl(tbBaseVal.value))
+        
+        'plug the adjustment required
+        tbAdjVal = Format(CDbl(tbFcVal.value) - CDbl(tbBaseVal.value) - CDbl(tbPadjVal.value), "#,###")
+        tbAdjVol = Format(tbFcVol - (CDbl(tbBaseVol) + CDbl(tbPadjVol)), "#,###")
+        tbAdjPrice = Format(CDbl(tbFcVal.value) / CDbl(tbFcVol.value) - ((CDbl(tbBaseVal.value) + CDbl(tbPadjVal.value)) / (CDbl(tbBaseVol.value) + CDbl(tbPadjVol.value))), "#.000")
+    Else
+        tbFcVal = 0
+        tbAdjVal = Format(CDbl(tbFcVal.value) - CDbl(tbBaseVal.value) - CDbl(tbPadjVal.value), "#,###")
+        tbAdjPrice = Format((tbBaseVal + tbPadjVal) / (tbBaseVol + tbPadjVol), "#.000")
+        tbAdjVol = Format(-CDbl(tbBaseVol.value) - CDbl(tbPadjVol.value), "#,###")
+    End If
+    tbFcVal = Format(tbFcVal, "#,###")
+
+End Sub
diff --git a/fpvt.frx b/fpvt.frx
index 28fe3e3..a9853bb 100644
Binary files a/fpvt.frx and b/fpvt.frx differ