St Louis Fed has numbers for this but they're averages; good starting point anyways and a liberal will probably go at it being a federal reserve bank's data lol.
Average Price: Eggs, Grade A, Large (Cost per Dozen) in U.S. City Average
Average Price: Milk, Fresh, Whole, Fortified (Cost per Gallon/3.8 Liters) in U.S. City Average
Average Price: Bread, White, Pan (Cost per Pound/453.6 Grams) in U.S. City Average
Actually you can go straight to the BLS source (consumer price index released monthly) but the St Louis Fed is probably the easiest place to see all that info at a glance & they even have it for commodities like the global price of uranium!!