or "tuition" instead of "fees" if this refers to yearly charges for studying at universities, institutes, or private schools

"difference" doesn't work here because it could refer to a plus or minus amount, while إن وجد (if applicable) indicates only an excess amount.


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Note added at 2 hrs (2012-03-28 22:27:44 GMT)
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Mukhtar, I don't think "differential fees" really works. "Differential" is more of a mathematical term and doesn't get the meaning from the context across. If I read it that way I don't think I would understand what was meant.