PRESCRIPTION: Huge difference in prices

As a summer resident here in Coeur d’Alene, and needing to refill a common prescription while here, I was shocked when the same drug that I pay under $9 for in California costs nearly $60 at three local Coeur d’Alene drug stores — Walgreens, Rite-Aid and Fred Meyer. Someone suggested I try Costco pharmacy. I did this and they quoted the price at just under $6! In every case, the costs were for the very same drug, dosage and quantity. HOW CAN THAT BE?

IRENE SMITH

Coeur d’Alene