U.S. light crude was trading erratically on the New York Mercantile Exchange, hitting $44.50 a barrel before easing back a bit to $44.10, still a gain of $1.27.
U.S. light crude is sold by the barrel
The price is based on per barrel
( z1 sell :ARG1 ( z2 crude :ARG1-of ( z3 light ) :mod ( z4 country :name ( z5 name :op "U.S." ) ) ) :frequency ( z6 volume-quantity :quant 1 :unit ( z7 barrel ) ) )