How much will it cost to get a rotted/leaking transmission line replaced on a 1992 Buick Century?

I'm not exactly sure which line or whatever all I know is it's the transmission line and it's leaking {momentarily stopped the leaking with a hose clamp}. I just want an estimated price for the fix so I can be somewhat prepared. Anyone know? Thanks soooo much.How much will it cost to get a rotted/leaking transmission line replaced on a 1992 Buick Century?just go to the junk yard and take 1 off another car like yours. that,s the cheapest way of doing it.