This is the 6150th most frequent Korean word.
수강료를
"Tuition fee" or "course fee."
The word '수강료를' here indicates the object of the verb '납부하다', meaning to pay the course fee.
저는 이번 학기에 수강료를 이미 납부했어요.
I already paid the course fee this semester.
'수강료를' serves as the object of the verb '할인해주다', indicating that the course fee is the discounted item.
그 대학은 외국인을 위해 수강료를 할인해줍니다.
That university offers a discount on the course fee for foreigners.
'수강료를' acts as the object of the verb '납부하다', and the sentence explains a requirement involving the course fee.