Does this have something to do with PvsNP problem? Its solution provides a perfect algorithm for facturing numbers i guess

Teaching on the 50/60's: A farmer sold a basket of potatoes for 50$. His expenses for production were 4/5 of the selling price. What was his profit? Teaching on the 70's: A farmer sold a basket of potatoes for 50$. His expenses for production were 4/5 of the selling price wich were 40$. What was his profit? Teaching on the 80's: A farmer sold a basket of potatoes for 50$. His expenses for production were 4/5 of the selling price wich were 40$ so his profit was 10. Underline the word potatoes and chat about it with your classmates. Modern teaching: A farmin persun got a subsidy of 40 to plant any potatus then he sells fur 50. Draw 1 putato an state what u thinc about getin rish.