On january 1, 2018, tabitha designs purchased a patent giving it exclusive rights to manufacture a new type of synthetic clothing for $240,000. while the patent had a remaining legal life of 15 years at the time of purchase, tabitha expects the useful life to be only eight more years. in addition, tabitha purchase equipment related to the production of the new clothing for $140,000. the equipment has a physical life of 10 years but tabitha plans to use the equipment only over the patent’s service life and then sell it for an estimated $20,000. tabitha uses straight-line for all long-term assets. the amount to expense in 2021 related to the patent and equipment should be: a. $40,000b. $38,000c. $45,000d. $31,000