Why? If you know the answer, why should we figure it out? If you don't know the answer or you only think you do, you should at least indicate that and possibly "show your work" and what you would expect the answer to be.
Have you tried this in the system? What did the system calculate? Are you disagreeing with what it calculated? If so, tell us that.
Also, this contains a formula. How can we make a calculation since you didn't provide a lot size.
Lastly, please know that your posting was reported for failure to search. I'm wasn't convinced of that but on the other hand, I'm not really sure of your issue either.
Craig