Remember :
Communism is anti-business. Businesses aren't allowed to make large profits. Demand-Supply curve isn't allowed in the market. Which is why government fixes prices and forces businesses to sell at that.
Capitalism : market is allowed to adjust on demand and supply. One is allowed to sell anything at any price he wills.
BD in the 70s was mostly communist.
And now a days when you see magistrates in the market fining businessmen for selling grocery items at higher rate than what they believe is fair "on the fly" -- know that communism has returned without its name.