State which of the following are the obtaining contract costs of a Zoom Company for the contract with a Yandex Company: a) The Chief executive bought a ticket for a flight to the city where he was born. b) The Zoom Company purchased a unique machine to prepare examples of the IT solutions that will be sold to the Yandex Company. c) The Zoom Company accrued a salary to the Chief executive. d) Depreciation for a plant of the Zoom Company. e) Zoom companys expenses for the lawyer to prepare a contract with the Yandex Company.