-I didn't figure this out either until this morning, lol. You're not alone! It's just hiding in plain site.There's an upgrade button under the letter. So under F it will say 'upgrade' and click on that. It will tell you how much money you need, and people hired in order to upgrade.
-Likewise, when you click on ranch employees it will also have a button that says "level up" and accordingly will tell you what you need to upgrade your ranch employees with.
-Another thing that I didn't realize until today was the upgrade for what the employees make (milk, eggs, wool, etc).
-As well as the upgrade button for the Milk, Egg, and Wool factories, and in the corner it gives you two different upgrade options.
-When you click on let's just say for example, the Milk Factory. Then in the corner of the screen you will find the details needed for both the produce & factory upgrades.
-I'll also add the images pertaining to this down below if they help! And that way anyone else that has the same question can also check here for it. Sorry if the images are super large, I wasn't able to make them smaller.
