nitrogen

More nitrogen is used by customers than any other industrial gas. It is used in a broad range of industries, including chemicals, pharmaceuticals, petroleum processing, glass and ceramic manufacture, steelmaking and other metals refining and fabrication processes, pulp and paper manufacture, and healthcare. Aside from N2, nitrogen may be referred to as GAN or GN in its gaseous form, and LIN or LN in its liquid form.

1000000scf = 32.86 metric tons
does us$61/metric ton sound right