If avocados are not sold in New York and not shipped from Columbia, then they are neither sold in New York nor New Haven.
All fruits sold in Boston are shipped from Columbia.  Some fruits sold in New Haven are shipped from Mexico. No fruits shipped from Columbia are fruits sold in New York.  Avocadoe are a kind of fruit sold in New York or New York.  Avocadoe are either shipped from Columbia and sold in New Haven, or neither shipped from Columbia nor sold in New Haven. 
∀x (SoldBoston(x) → ShippedFromColumbia(x)) ∃x (SoldNewHaven(x) ∧ ShippedFromMexico(x)) ∀x (ShippedFromColumbia(x) → ¬SoldNewYork(x)) SoldNewYork(avocado) ∨ SoldBoston(avocado) ¬(ShippedFromColumbia(avocado) ⊕ SoldNewHaven(avocado))