Greek Online Shop (OSCommerce) Totals Calculation but first have to Translate it

Job ID: 33128785

Budget: €8 – €30 EUR

Greek Online Shop (OSCommerce)
Need to change the way that the points redemption is calculated on Frontend and Backend and writed on "orders_total" Table on field "ot_subtotal_ex".
Now the calculation of "ot_subtotal_ex" field is as bellow
ot_subtotal_ex = Net product prices net
I want the "ot_subtotal_ex" to be calculated as follow if a points redemption is present
"ot_subtotal_ex" = Net product prices -(minus) ot_redemptions
files that are used as I know (attached)
admin/orders.php ->lines 1858-1891
checkout_confirmation.php ->find checkout_ajax_totals.php
admin/includes/functions/general.php ->lines 2211
because it's a module maybe this to
includes/modules/order_total/ot_total.php or ot_redemptions.php
see attached pictures after changes it must look like the pictures nr-2
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So in order to start Forgot all the above and Start to make the Translation of the Totals Section of admin/orders.php (see Totals-Backend-2.png) and the Translation of admin/invoice.php (see Totals-Invoice.php-2.png) so you can understand what every field means in English and we can discus the above job. This job is only the Translation (converting inline to work with the language files) of the Totals Section of admin/orders.php (see Totals-Backend-2.png) and the Translation of admin/invoice.php (see Totals-Invoice.php-2.png) files of the Totals Section of admin/orders.php (see Totals-Backend-2.png) and the Translation of /admin_sifis/includes/languages/english/invoice.php (see Totals-Invoice.php-2.png) and I don't know where the file is used for the Totals in /admin/orders.php maybe it should be in /admin_sifis/includes/languages/english/modules/order_total/some_file.php
Related categories: PHP AJAX OSCommerce MySQL HTML