Reborn in the 1980s: I’m Back with My Pocket Dimension

I can't stand it anymore, it's simply illogical. The heroine deceived her family and told the village chief that the fruits and vegetables were bought by classmates and relatives, or grown in greenhouses. I would like to ask, in the early 1980s, could fruits and vegetables grown with such technology be cheap? They actually wholesale it to the village chief's family. All fruits and vegetables cost 20 cents per catty. What kind of family price is there? Is there such a cheap family price? The author also doesn't want to think about it. In reality, the heroine has neither the skills nor the land to grow these things. It was fine at the beginning, but as time goes by, can she continue like this? What should she do once she leaves this place? I feel like the people in the whole book are all intellectuals.

Is there a male protagonist?

I have long forgotten the specific content, and I haven't finished reading it anyway, so I'm annoying you to keep pushing it.