Where are the checklist and the trip's expenses?

1
Under the trip's name
Checklist shows how many tasks are done; Budget shows what has been spent so far.
On the web: On the web the second one is called Expenses.
2
The checklist
Tasks for before you go, with sub-items, that everyone on the trip can tick.
3
The expenses
Choose the trip's currency and tap Add expense for each one. The total sits at the top.