My back of the envelope maths on the U.S. major customers...

My back of the envelope maths on the U.S. major customers is:
10,000 tests by 15 customers = 150,000 tests per month X 12months = 1.8million tests per annum.
=29 million in sales
=14 million cost of sales
=7.6 million profit at about 60%
Less 30% tax rate
=5.4 million NPAT

I am open to others and there superior maths to correct me.Remember this is only the large customers in the U.S.

Look forward to your replies

Cheers