Sorry, it seems that I misled you. Please let me explain what I did, first, create a variable named "Summary" do sum and it type as BigDecimal. second, create a variable named "MinusValue" with Variable Expression "new BigDecimal(130000)" third, create a variable named "ResultValue" with Variable Expression "$V{Summary}.subtract($V{MinusValue})" fourth, drag the variable Summary into report and set Evaluation Time of the field to "Report" last, drag the variable ResultValue into report and set Evaluation Time of the field to "Report" preview the report and that's all, hope this would help you.