I think I will buy 3.

  BTW btc is up to 618 usd.

Now since I purchased 2.25 btc at 560 usd specifically to buy these.  

Should:

 I tell myself they cost  me  .75 x 560 usd = 420

Or should I tell myself they cost me .75 x 618 = 463.50



Hey   s1gs3gv

 how should I do cost basis?