Question from a Lean Six Sigma Black Belt Student

The calculator sheet is very useful. But for my situation here in my plant, we produce bulk product (1200 MT of Refined Canola Oil). Suppose we need to test for “linoleic value” at the finished product, which is fluctuating between 1.75 and 2.39 values (margin of 0.64), sigma estimate is 0.26 and average of 2.06. So if we put this data in the sample size calculator we’d get a sample size of 1 (N unknown) or 0 (N known) at 0.05 Alpha risk. What is 1? 1 Metric Ton or 1 sample? And if it is one sample as I think it is, how large should be the sample? 4 Oz container or 1 Liter? Also if it is 1 MT that’s huge and expensive sample. Also I am confused about the zero number I got for the know N. How come that I do not need sampling at all?

For your info, this is one of the main reasons I decided to pursue six sigma is to be able to identify sample size when I needed to. That has been a question in my mind since long time specially about bulk product and I feel good now that I am in touch with you so you can help me out on this.