Labour leader Ed Miliband struggled to name the cost of a weekly shop for a family of four, putting his own family's grocery bill at "£70-80 a week".
Asked on ITV's Good Morning Britain about the average weekly household grocery bill, Mr Miliband responded: "It depends on how much you are spending."
The weekly average spend per person on food and non alcoholic drinks came to £25.98, adding up to £103.92 for a family of four, according to the 2012 Family Food report from the Department of Environment, Food and Rural affairs.
Mr Miliband, who is married with two children, admitted to being "relatively comfortably off" but was adamant Labour were "determined" to tackle the issues facing the general public.
More top news
85% of products surveyed by the charity Action on Sugar were found to have more of the sweet stuff than Haribo.
New Psychoactive Substances Bill creates a blanket ban on the sale of legal highs, with up to 7 years in jail for selling them.
Pharmaceutical giant Roche is trialling a new type of treatment which could work better than chemotherapy.