Sales invoices has amounts owing in both AUD & USD
Purchase invoices has NO amounts payable in both AUD & USD
Cash basis
No receivable showing AUD or USD (possibly due to the way Cash Basis works)
No payable showing AUD or USD (correct regardless)
Accrual basis
Has values for receivable showing AUD or USD (but may be incorrect values ( due to Suspense account errors)
No payable showing AUD or USD (correct regardless)

