Continued to check the data and the application, as per checking, the data in MySQL is not tally with the data in the application, though when the script in Mall Sending is used in extracting data in MySQL it is tally when added the serial='E' condition, the extracted data is bigger than the expected data. Checked as well the formula used in the application, as per checking the only data with a value in the formula is the daily sales, the return, void, discount, and nonvat has no value. But the data in mall sending is not tally with the expected data. Advised sir Ian with all the findings and requested a receipt to compare with the data in MySQL and Mall Sending.