For the overlapping the pre defined price input, you have to fixed it by css, it’s best fit for 4 items, if you need more, then you should do it by css.

Please see the price issue below.

At the file /root/app/helpers.php Line number 201

Find the below line

$amount = number_format($amount,2);

Replace it with below line

$amount = number_format($amount,2, ',', '.');

It will help you to solve thousand and decimal separator

Best Regards