Competition of 4

You are participating in an elite chess tournament for $4$ people in the world only. There are prizes in this tournament, obviously. If you finish rank $i$, you get $1000 \cdot 2^{4 - i}$ rupees. Thus, the prizes are as follows: - Rank $1$: $8000$ rupees - Rank $2$: $4000$ rupees - Rank $3$: $2000$ rupees - Rank $4$: $1000$ rupees You finished at rank $X$. How much prize money did you win? ##