$750k - $600k = $150k.
$150 x 1% = $1500
Plus $500 = $2000 all up. per year
So yes that is correct if you owned the property.
In NSW it would be
$750k - $432k = $318k
$318k x 1.6% = $5,088
Plus $100 = $5,188 all up per year
In VIC
$750k - $600k = $150k
$150k x 0.5% = $750...