Cheapest Ways to Eat Fruits and Vegetables

Frozen

 * raspberries
 * collard greens
 * turnip greens
 * okra

Canned

 * green beans
 * tomatoes
 * sweet corn
 * green peas
 * asparagus

Dried

 * grapes/raisins
 * apricots

Juice

 * grapefruit (frozen)
 * orange (frozen)
 * pineapple
 * prune (plums)
 * tomato

Source
''How Much Do Americans Pay for Fruits and Vegetables? '' AIB-790. Economic Research Service/USDA