update vs4tpomb set tpobcost = tpobnetamount/tpobquantitycalc where tpobcost is null
update vs4tpomb set tpobcostamount = tpobnetamount where tpobcostamount is null
update vs4tpomb set tpobDivideExpense = 0 where tpobDivideExpense is null
update vs4tpomb set tpobDutyAmount = 0 where tpobDutyAmount is null
