Answer:
The warehouse should be recorded at $600000
Explanation:
The historical cost pricniple or convention is a really important convention in accounting that states and requires that assets should be recorded in the books at the orignal price thata was paid for them at the time of purchase. Thus, basing our decision on the historical cost principle, as Green Enterprises purchases the warehouse at a cost of $600000, it should be recorded at this cosy only.