choosing organic for your budget

This artical is from Dr. Mercola's website:

This list is a great tool to help you choose organic foods to fit your budget. For the items with the most residue, try to make that your organic priority. Make sure to wash all produce regardless :)

Least amount of residue:
Broccoli
Eggplant
Cabbage
Banana
Kiwi
Asparagus
Sweet peas (frozen)
Mango
Pineapple
Sweet corn (frozen)
Avocado
Onion

Most amount of residue:
Peaches
Apples
Sweet bell peppers
Celery
Nectarines
Strawberries
Cherries
Lettuce
Grapes (imported)
Pears
Spinach
Potatoes

A conventionally grown product carries a 4-digit PLU code (Ex: conventionally grown banana: 4011)
An organic product carries a 5-digit code, starting with the number 9: (Ex: organic banana: 94011)
BAD! A genetically engineered (GE or GMO) product has a 5-digit code, starting with the number 8: (Ex: GE banana: 84011)