The Boost digits only option does not work for table fields. This limitation can be circumvent using a script. For table fields, use the pTable.IsColumnNumeric column-level property at the very end of the Document_PostExtract event. Set the isColumnNumeric property to False to disable alpha to digit boosting.
Example: Boosting tables
Private Sub Document_PostExtract(pWorkdoc As SCBCdrPROJLib.SCBCdrWorkdoc)
Dim pField As SCBCdrField
Set pField = pWorkdoc.Fields.ItemByName("LineItems")
pField.Table(pField.ActiveTableIndex).IsColumnNumeric("Date") = False
pField.Table(pField.ActiveTableIndex).IsColumnNumeric("Unit Price") = True
pField.Table(pField.ActiveTableIndex).IsColumnNumeric("Quantity") = True
pField.Table(pField.ActiveTableIndex).IsColumnNumeric("Total") = True
End Sub