RE:RE:RE:Thanks to ausumemathWow. You are totally confusing your gas and liquid density and coming off base.
The density of helium gas 0.178 grams/ liter. I could not find a different density between He3 and He4
the density of liquid helium I came up with is 125 grams per liter for He4 and 59 grams/liter for He3 but that has no affect on this calculation
Here is where your calculation is off:
Since you do not produce liquid helium, Helium is in a gas state so you use the gas density to calculate the amount of grams in an MCF. MCF stands for 1000 cubic feet of gas.
so here goes using standard units. Density of helium gas being 0.0114 lbs/cubic foot or 11.14 pounds/MCF Take 11.14 lbs x 454 grams and you 5,058 grams of helium per MCF of helium you produce.
Now the thing is that you said its 300 parts per million He3. That means in every MCF of helium you produce you get 5058 grams times 300/1000000 (300 ppm) is equal 1.5 grams of Helium 3
1 MCF helium is then 300 dollars plus 1.5 times 1400 = 2100 for a grand total of 2400 dollars an MCF for the helium. Sinnce there is no plant in USA that makes HE3, you netback might be small