Yes, correct. Apart from Biedronka, there is also Liedl. You might check their sites and try to figure out the prices.
E.g.,: lidl.pl/cps/rde/xchg/SID-99A63CB8-E1F47666/lidl_pl/hs.xsl/7509.htm
What is Kaczynski style?
It is posh performance shopping in the style of a superstar, with TV cameras around you etc, in the most expensive stores/shops in the area.