What are the odds of this numbers game?

[Stan Loh]

Basically a numbers game. You pick 4 digits, pay $1.

Payout table is for each $1:

exact 4 numbers: $4000
exact last 3 numbers: $500
exact last 2 numbers: $50

5% back on every $1 spent.

Just want to calculate the odds. It's a lottery, yes. But what's the insane house edge? No, I am not going to play this, but I would just like to know.

Thanks.