Describe the problem:
The average cost for an asset I purchased is in correct. It is being reported as $0.35 AUD and i purchased it for $0.85 AUD therefore the gainst that are being reported are not correct.

Which exchange/wallet is this regarding?
Bitstamp
How did you import data into this wallet?
API
What have you tried to fix this so far?
I have looked into the transactions to validate them, there doesnt appear to be anything I can do to change the reporting metrics on the transaction.