There is a bit of irony in having the 'Breezie' Mann's character, played by Chill Wills sing and record songs for Vic Morton to lip synch, since Wills was a baritone, and he lip synched the songs himself.
The $2,500/week Vic was offered in 1947 has the same buying power as $30,000 in 2020. Working just 26 weeks (6 months) he would earn the equivalent of $780,000 in 2020.