Database (DB) is rounding incorrectly

[portsamerica]

I am new with access database and our database having rounding issues can any one help me here is the Query.

Private Sub ComputeInvoice(ciArg As String)
    If IsNull(Me.[CustomerID]) Then
      MsgBox ("Customer ID required!")
      Exit Sub
    End If
    Dim SUBTOTAL As Double
    Dim MATERIALCOST As Double
    Dim HOURSTOTAL As Double
    Dim TAX As Double
    Dim MyDB As Database, MyRS As Recordset
    Set MyDB = DBEngine.Workspaces(0).Databases(0)
    Set MyRS = MyDB.OpenRecordset("tblcustomers", dbOpenTable)
    MyRS.Index = "CustomerID"
    MyRS.Seek "=", Me![CustomerID]
    Me![CustomerID] = MyRS![CustomerID]
    Me!LABORRATE = MyRS![LABORRATE]
    MyRS.Close
      
    SUBTOTAL = 0
    MATERIALCOST = 0
    HOURSTOTAL = 0
    'MsgBox Val(materialcost)
    If Not IsNull(Me![MAT1]) Then MATERIALCOST = MATERIALCOST + Me!MAT1
    If Not IsNull(Me![MAT2]) Then MATERIALCOST = MATERIALCOST + Me!MAT2
    If Not IsNull(Me![MAT3]) Then MATERIALCOST = MATERIALCOST + Me!MAT3
    If Not IsNull(Me![MAT4]) Then MATERIALCOST = MATERIALCOST + Me!MAT4
    If Not IsNull(Me![MAT5]) Then MATERIALCOST = MATERIALCOST + Me!MAT5
    If Not IsNull(Me![MAT6]) Then MATERIALCOST = MATERIALCOST + Me!MAT6
    If Not IsNull(Me![MAT7]) Then MATERIALCOST = MATERIALCOST + Me!MAT7
    If Not IsNull(Me![MAT8]) Then MATERIALCOST = MATERIALCOST + Me!MAT8
    If Not IsNull(Me![MAT9]) Then MATERIALCOST = MATERIALCOST + Me!MAT9
    If Not IsNull(Me![MAT10]) Then MATERIALCOST = MATERIALCOST + Me!MAT10
    If Not IsNull(Me![MAT11]) Then MATERIALCOST = MATERIALCOST + Me!MAT11
    If Not IsNull(Me![MAT12]) Then MATERIALCOST = MATERIALCOST + Me!MAT12
    If Not IsNull(Me![MAT13]) Then MATERIALCOST = MATERIALCOST + Me!MAT13
    If Not IsNull(Me![MAT14]) Then MATERIALCOST = MATERIALCOST + Me!MAT14
    If Not IsNull(Me![MAT15]) Then MATERIALCOST = MATERIALCOST + Me!MAT15
    If Not IsNull(Me![HOUR1]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR1
    If Not IsNull(Me![HOUR2]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR2
    If Not IsNull(Me![HOUR3]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR3
    If Not IsNull(Me![HOUR4]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR4
    If Not IsNull(Me![HOUR5]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR5
    If Not IsNull(Me![HOUR6]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR6
    If Not IsNull(Me![HOUR7]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR7
    If Not IsNull(Me![HOUR8]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR8
    If Not IsNull(Me![HOUR9]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR9
    If Not IsNull(Me![HOUR10]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR10
    If Not IsNull(Me![HOUR11]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR11
    If Not IsNull(Me![HOUR12]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR12
    If Not IsNull(Me![HOUR13]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR13
    If Not IsNull(Me![HOUR14]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR14
    If Not IsNull(Me![HOUR15]) Then HOURSTOTAL = HOURSTOTAL + Me!HOUR15
    Me!totalmaterial = Round(MATERIALCOST, 2)
    Me!totalhours = Round(HOURSTOTAL, 2)
    
    Me!totalcost = Round(HOURSTOTAL * LABORRATE, 2)
    SUBTOTAL = Round((HOURSTOTAL * LABORRATE), 2) + MATERIALCOST
    If Me!TYPE = "LR" Then Me!totalhours = Round((HOURSTOTAL * 1.5), 2)
    If Me!TYPE = "LR" Then Me!totalcost = Round((HOURSTOTAL * 73), 2)
    
    If Me!TYPE = "LR" Then SUBTOTAL = Round((HOURSTOTAL * 73), 2) + MATERIALCOST
    
    
 
    TAX = 0
    Me!invoicetotal = SUBTOTAL + TAX

If ciArg = "C" Then
  Exit Sub

Can any one tell me when i add to total why my total is wrong like one digit up or down.

[Motoma]

Hi portsamerica,
Perhaps you could tell us what language you are writing this in, as well as the database you are using. Also, give us a general sense of where the error is occurring. List any debugging methods you have tried, as well as your thoughts on their results.

[portsamerica]

this is MS ACCESS 2003 database and i never work on it.my boss want me to look in to that and fix the rounding issue.

[NeoPa]

Please tell us which item is rounding incorrectly.
What type of field is used for the item?

[FishVal]

Take a look at the thread Round function - how it REALLY works

Regards,
Fish