The ³⁵S atom on a radiolabeled amino acid, methionine, has a half-life of 87.4 days. A quantity of 1.00 mCi is available for only $1,405(!)

What is the mass of radioactive methionine purchased, considering the manufacturer's claim that the specific activity is 43.5 TBq)/millimole? (The molar mass of the S-35 labeled amino acid, methionine, is 149.21 g/mol.) (Follow-up: what's the price per gram?!?)