score:4
Don't forget rationing. Prices under wartime conditions were artificial. Also the answer varied from country to country.
Upvote:2
For the UK, bread and potatoes were never rationed. Meat, cheese, eggs, sugar, and most fats were rationed. People grew more food - almost all gardens were turned over to vegetable production - and ate somewhat less. The types of food people ate changed significantly: dishes would be based on vegetables, with small quantities of meat and fat for flavouring. Many people made stock from bones, jam from garden fruit and so on. The rationed diet was adequate and healthy, but dull unless you put in effort to make it interesting.
The Wikipedia article has substantially more detail.