How much money do the kids have for supplies in Stand by Me?

I love the entire vibe of Stand by Me, right up to the final moments when the author of the memoir wraps up just in time to head outside and play with his young son. Because that's totally how writing anything goes.

How close were you paying attention the last time you watched this 1986 coming-of-age movie? Which, by the way, featured maybe the strongest group of kid actors on that side of the millennium.

There's an interesting number they're able to scrounge up in order to buy supplies for their trip to see the dead dude. How much was it?