Continued to modify the web application to fix the error encountered when a different library for importing the excel is used, tested the changes made, as per checking it is now OK, checked the uploaded data, as per checking, there are validation failed in the quantity, as per checking, the error details is the quantity inserting a decimal value but it is a whole number in the excel, checked the uploaded value, as per checking, the phpspreadsheet library read the quantity and price value as decimal even it is not on the excel. Modified the web application again to fix this and requested assistance from Nate, an alternative solution is made as to the reason why the PHP spreadsheet is reading the quantity and price as a decimal is not yet determined. Checked the modified web application, as per checking, the solution works. Tested different test case to check if there are no affected functions, as per checking, All is OK and the result is as expected.