C. a trademark was purchased by sti for p 1,280,000 on july 1, 2019. expenditures for successful litigation in defense of the trademark totaled to p 326,000 were paid on july 1, 2021 and were charged to the trademark account. the trademark was estimated to have an indefinite life. by the end of 2021, the company estimated to generate annual net future cash flow from continued use of the trademark at p 90,000. the prevailing market rate of interest on this date was at 9%.