If you know your career path will be in non-tech roles, then I highly suggest you become a excel guru (or as close to it as you can get) and supplement with BI visualization tools (I am biased to say PowerBI more than Tableau because of stronger overlap between excel power query and powebi). Some basics of SQL querying but needn't go deeper into database modeling
For buying and account management, brush up on corporate finance and scm basics, again no need to go heavy into accounting topics
If you have more time after completing all of these, then read up on pricing strategies and managerial economics