A company acquires a patent for a drug with a remaining legal and useful life of six years on January 1, 2011 for $2,100,000. The company uses straight-line amortization for patents. On January 2, 2013, a new patent is received for a timed-release version of the same drug. The new patent has a legal and useful life of twenty years. The least amount of amortization that could be recorded in 2013 is

a. $350,000. b. $ 70,000. c. $ 95,454. d. $ 80,500.

please explain!