Well, that sort of blows my rightside theory...
Sorry, I've done a number of these Control Arm jobs myself for some friends and relatives [for free].
No idea on labor costs in the real world.
My WAG would be 2 hours per side given a lift, proper spring compressor, and experience. Not sure what the 'book' time is.
Someone here will almost certainly know.
The parts run around $100 per side online.
Best of luck.
1986 300E 5-Speed 240k mi.