if I bought total 1 BTC
with this list
0.3@700
0.2@702
0.4@705
0.1@706


is it....0.2% of 1 BTC = 0.002 BTC

or

0.2% of 0.3x$700 = $ 0.42
0.2% of 0.2x$702 = $ 0.2808
0.2% of 0.4x$705 = $ 0.564
0.2% of 0.1x$706 = $ 0.1412
total--------------- = $ 1.406