Caitríona Redmond: Why do we feel like we have less money for groceries?

According to the most recent CSO data, the cost of butter has risen by 9.4% in 12 months, which is no surprise when you consider the price of whole milk has increased by 8.4% in the same period.
"Can you please take a look at the price of butter?” wrote a reader recently.
“It has increased in price so much I’ve started to use less.”