(1) For the purposes of the Act and this Decree, "ordinary wage" means hourly wage, daily wage, weekly wage, monthly wage, or contract amount to be paid to an employee for a specifically agreed work or entire work on a regular and flat basis.
(2) Where the ordinary wage under paragraph (1) is calculated on an hourly basis, the following formula shall apply to such calculation: <Amended on Jun. 29, 2018>
1. The amount agreed upon as an hourly wage, if a wage is paid on an hourly basis;
2. The amount obtained by dividing a daily wage by the contractual working hours per day, if a wage is paid on a daily basis;
3. The amount obtained by dividing a weekly wage by the number of standard hours (referring to the hours calculated by aggregating the contractual working hours per week and the hours counted as paid working hours besides the contractual working hours) for the calculation of the weekly ordinary wage, if a wage is paid on a weekly basis;
4. The amount obtained by dividing a monthly wage by the number of standard hours (referring to the hours obtained by dividing by 12 the number calculated by multiplying the number of standard hours for the calculation of the weekly ordinary wage by the average number of weeks per year) for the calculation of the monthly ordinary wage, if a wage is paid on a monthly basis;
5. The amount obtained by applying subparagraphs 2 through 4 mutatis mutandis, if a wage is paid on a specific time basis other than on a daily, weekly or monthly basis;
6. The amount obtained by dividing a total sum of wages calculated on a contractual basis for the period for the calculation of the wages by total working hours during the same period (referring to the wage settlement period, if there is a date set for the settlement of wages), if a wage is paid on a contractual basis;
7. The amount obtained by adding up the amounts calculated in accordance with subparagraphs 1 through 6, if at least two different types of wages set forth in subparagraphs 1 through 6 are paid.
(3) Where the ordinary wage under paragraph (1) is calculated on a daily basis, such ordinary wage shall be calculated by multiplying an hourly wage under paragraph (2) by the contractual working hours per day.