First of all there is no 'hyper inflation' in Russia. Hyper inflation is not just 50% or 100% inflation, hyperinflation is thousands percent and more. This is just kids play, compared to hyperinflation.
Secondly there are markets in Russia, people buy and sell products and commodities and labour and while there are regulations, actually they are much lower than regulations in countries like the USA. So store owners who paid their money for their stock respond to the market conditions by raising prices, that's market dictated behaviour and not government regulated behaviour (though this behaviour is a response to a government created problem).
The point is your example with a bakery is absolutely false, a bakery will change prices if the market forces dictate it so.