Ticket counter option for multiple tickets

Please add a numberbox counter for each added ticket.
Default setting for this box is 1. So that each purchased ticket is counted as 1 for the Maximum amount of sold tickets.

When a couples or group ticket is sold, you can increase the number in the numberbox accordingly and still keep the amount of sold/counted tickets correct.

Also using 0 (zero) in the box can be helpful when the ticket is not a person but an extra service.

Please add this option, thanks you!