24 months is a long time, but assuming there's something you want at TGG, $24/m for 100Gb on the full Telstra 5G network is hard to beat.
$69 - $20 port in discount (have to separately request via chat) = $49
$49 * 24 = $1176 total cost
$1176 - 600 = $576 net
$576 / 24 = $24/m
Sir we dont do 24 month contracts here.