Let’s not forget the price of fuel to get the food to the stores for another reason prices are at their highest.
Check it out:

Global food prices rose to their highest in almost a year in March, led by unfavorable weather for crops and political tensions over Ukraine, the United Nations food agency said on Thursday.

The Food and Agriculture Organization’s (FAO) price index, which measures monthly price changes for a basket of cereals, oilseeds, dairy, meat and sugar, averaged 212.8 points in March, up 4.8 points or 2.3 percent from February. The reading was the highest since May 2013.