A little complaint on my part.
At 6:30 p.m., all 20 or so cups of vermicelli in the refrigerated section are already labeled with a reduced price of $2.30 instead of $3.40.
Normally, they are reduced in two stages, with the second stage taking place a little later (store closes at 8:00 p.m.).
The promotional price, on the other hand, would have been $2.28 (for two or more), so I ended up paying "more."
I'm not going to quibble over 0.04, but it's interesting to see what combinations this leads to.