Prices in Washington vs here?

Is it just me or are many things the same sticker price in washington (or higher) as here, except it's US dollars?

Specifically at restaurants/gas stations? Or is that just when you're close to the border? Like I'm seeing 2/4$ 500mL bottles of coke, and in Canada it's 2/4-5 usually at the gas station.

And getting a bottle of pop or juice with your fast food meal in Washington I'm usually seeing 3+ dollars to add it on.

Chocolate bars are all pretty similar price to home, except again it's in USD of course.