1st question

Sorry, the 20% is not 461,000 that was for a different house that I had to do!, the 20% is $448,492.208 which then I would need to have rounded up to $449,000 so its per thousand which was for my other questions.

2nd question

Yes interest is charged at 6.5% p.a

Option 2 question

Oh thank you, I was not sure what Formula would be needed to solve/find the answer to option 2 (dot point 2)