Sub Document_Open()
Application.ScreenUpdating = False
Dim StrName As String, StrQty1 As String, StrQty2 As String, StrVal As String
StrName = InputBox("What is the name?")
StrQty1 = InputBox("How many apples are there?")
StrQty2 = InputBox("How many apples do you want?")
StrVal = InputBox("How much each are they?")
Call UpdateBookmark("Name", StrName)
Call UpdateBookmark("Qty1", StrQty1)
Call UpdateBookmark("Qty2", StrQty2)
Call UpdateBookmark("Price", StrVal)
Application.ScreenUpdating = True
End Sub

Sub UpdateBookmark(StrBkMk As String, StrTxt As String)
Dim BkMkRng As Range
With ActiveDocument
  If .Bookmarks.Exists(StrBkMk) Then
    Set BkMkRng = .Bookmarks(StrBkMk).Range
    BkMkRng.Text = StrTxt
    .Bookmarks.Add StrBkMk, BkMkRng
  End If
End With
Set BkMkRng = Nothing
End Sub