Shorting DASH on margin

[Samarkand]

Hey guys,

I´m currently thinking about opening a few decent-sized short positions
on DASH.

I was thinking about doing this on Bitfinex.
However, I still have a few remaining questions:

1. If I calculate my costs for the position using the FRR for DASH margin funding I
arrive at roughly 0.26 % for 30 days. This seems extremely low. Have I done
a mistake in my calculation? I assumed that I simply had to multiply
the FRR rate by 30 in order to get a rough estimate for the costs for
30 day short position (excluding the trading fees when I close
the position).

2. Are there other exchanges that offer shorting DASH on margin?

Thank you for your help.