11/10/98 - Lynx has been having problems with CBTIPT.
1 - TSUSA LIST BY INVOICE - Lines have the correct HTS# but the wrong letter.
	I suspect this is caused by changing the PN Database after the invoice
	data is entered.
2 - TSUSA CROSS REFERENCE LIST - Shows codes that are not used.  
	This is caused by selecting a part and then deleting it.

Need to change CBTIPT to be sure that any HTS# shown on the cross reference 
list has been used.  

In SUB PRTFILE, need to validate letter to HTS number.
  If not correct:
	1 - Check all entries in ENTRY.PN.HTS for a match.
	2 - If no match add it at the end.