I want to update the subtotal and grand total on Magento with some additional charges and it should affected to order, invoice, cart page, order review page on check out?
I have rewrite two file to update subtotal and subtotal on database table
Below code written in config.xml file
Below two class has been rewritten.
I have rewritten above two class because i have added extra charge value in subtotal and grand total and it works fine on cart page and order review page on checkout last steps but when i place order it takes re-calculate all price on product and where that things happen in core file i didn’t found yet. So can anybody help me out from this problem would much appreciated.
Can anybody please help me out from this issue?