So using this method through the ATO:
Purchase Price: $100,000.00 (assuming no deposit is paid)
Sale Price: $150,000
Stamp Duty: $2,972.60
Solicitor's Fee (Purchase): $800.00
Solicitor's Fee (Sale): $500.00
Agent's Commission (incl. GST): $4,620.00
Total Cost Base: $108,892.60...