Expense Report currency questions

Hi

We have a situation.

1. A user is an employee of US Operating unit and as such setup in Oracle HR. His approver is also a US employee

2. He works in Germany/NL and as such and incurs expense in EUR

3. He submits expense report from the NL responsibility. But the expense report do not get directed to the approver and are stuck in the system

Question

1. How should the setup be so that the user gets reimbursed in EUR and also expense reports go through proper approval

Thanks

Ninad