"The price of labs crashed, obviously, so I'm going to have to wait to sell those."
Like a week after I wrote that I slapped myself upside the head and worked out how much labs cost to build. The answer is 55m.
I bought 177 labs for between 29 and 36 million, set up a buy order, and started walking the price back up. So far it's up to 48m. I expect to make a profit of about 3.8b.