question: private void cmd_calculateDifference ( ) { BigDecimal previousValue , actualValue ; Timestamp today = TimeUtil . getDay ( System . currentTimeMillis ( ) ) ; MCash cash = MCash . get ( p_pos . getCtx ( ) , p_pos . getC_CashBook_ID ( ) , today , null ) ; v_previousBalance . setValue ( cash . getEndingBalance ( ) ) ; previousValue = cash . getEndingBalance ( ) ; actualValue = ( BigDecimal ) v_ActualBalance . getValue ( ) ; v_difference . setValue ( actualValue . subtract ( previousValue ) ) ; }
target:  Calculate difference between previous balance and actual for cash scrutiny