You can format them as you want. Format syntax is…
<positive format>;<negative format>;<zero format>
So if you have #.00;-#.00;*zero*
0 value will appear as *zero*
.
If you have a ticket tag named People
you can add it into report by adding TT.Person field
as…
[Tickets:1,1, 1,1, 1, 1]
>Date|Ticket No|Amount|Cash|Credit Card
{REPORT TICKET DETAILS:
T.Date,
T.TicketNumber,
T.TotalAmount,
TT.Person,
PA.Cash,
PA.Credit Card}
Reading tutorials @Jesse linked will give more idea so once you get the idea you can create your own reports. SQL is needed for some advanced cases. Generally Custom Report tag syntax does the job fine.