STEM OPT 기간중 unemployment days 60일 인가요? 아니면 누적으로 150일인가요?

150일 다 썼으면 opt는 grace period 없습니다.

Grace Period
Students who do not exceed 90/150 days of unemployment and report employment to the ISS as required are automatically granted a 60-day grace period after the end date listed on the EAD (Employment Authorization Document).