Mostly how to make certain types of spreadsheets, some finance stuff and how to talk business crap with other business people.

It’s not rocket science.

Accounting (for example the poster in the link states marketing does not make up COGS, which to someone who studied accounting is obvious). Simple economics (poster reveals "secret" that Price*Quantity can equal higher total revenue when price/quantity change disproportionately). Consumer behaviour (Dr. Dre can lead people to believe crap from pile A is better than crap from pile B). This is apparent insider-knowledge from someone who spent several years in industry - or you can go to school for the first 1.5 years of a business undergrad program and learn it that way across many more industries. In the final years of business school once you've chosen a specialization, you may learn advanced corporate finance (stocks, bonds, weighted cost of capital, different types of break-even measurement like economic break-even vs accounting break-even). Or you may specialize in accounting, operations, marketing, yada yada. Then an MBA is apparently much of what is taught in a good business undergrad but perhaps faster-paced and you get a shit ton of networking value.