Safehouse Company was granted a patent on a product on January 1, 2011 with a 20-year useful life. To protect the patent, the entity purchased on January 1, 2021 for P4,500,000 a patent on a competing product which was originally issued on January 1, 2016. Because of the unique plant, the entity does not feel the competing patent can be used in producing a product. What amount should be recorded as amortization of the compting patent for 2021? a. 450,000 b. 225,000 c. 300,000 d. 0