Hi
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