How much is a propane exchange costs

I think it's 20

It's more than that. It's almost 20 $ last time I looked. I work there.

I believe it is 14.99 with exchange. Meet me there at 9:30am tomorrow 01-02-18 and I can help you.

Same around 20

Around 20

About $20

Somewhere between 17 and $20

Around 25

Around $17.