근로시간의 경우, 1주일간 주업과 부업의 근로시간을 합하고 이에 4를 곱하여 월간 총 근로시간을 구하였다.
In the case of working hours, the total working hours per month was obtained by summing the working hours of the main and side jobs for one week and multiplying this by 4.