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On January 1, 2018, ABC Co. grants 100 share appreciation rights (SARs) that will be settled in cash to each of 200 employees on the condition that employees will remain employed for the next four years. On December 31, 2018 the entity estimates that the fair value of each SAR is P15. On December 31, 2019 the estimated fair value of each SAR is P20. On December 31, 2019 the entity cancels the SARs and in their place grants 100 share options to each employee on the condition that each employee remains in its employ for the next two years. Therefore, the original vesting period is not changed. On this date the fair value of each share option is P23. All of the employees are expected to and ultimately do provide the required service. For simplicity, assume that none of the employees' compensation qualifies for capitalization as part of the cost of an asset. Find the following: a. salaries expense for the year 2018, 2019, 2020 and 2021