........................................................36 Credit sale....................................................................................................................................37 Mixed-tender sale.........................................................................................................................37 6Computation of VAT (Value Added Tax)/tax.......................................................................................37 VAT/tax system............................................................................................................................37 OPTIONAL FEATURES...............................................................................................................................39 1Auxiliary Entries...................................................................................................................................39 Percent calculations (premium or discount).................................................................................39 Deduction entries..........................................................................................................................39 Refund entries..............................................................................................................................40 Non-add code number entries and printing..................................................................................40 2Auxiliary Payment Treatment..............................................................................................................41 Currency exchange......................................................................................................................41 Received-on account entries...............................