600
To be fair, we weren't importing as many finished goods then, therefore we weren't competing in a global marketplace. If prices stayed the same temporarily, it wasn't a big deal.
Price controls cause shortages and rationing.
Edit: It's a pretty well-known concept that price controls cause shortages. Look what happened to communism. They said there was no inflation and prices were fixed forever. If a liter of milk is set at 1 rubble, and farmers can't make money at that price, milk selection reduces, or could even disappear.
Everybody in the supply chain has to make money, otherwise the chain breaks.