Complex sentence: A Continuing Education course taught during the school year costs $650 per semester; during the summer, the cost for the identical course, taught by the same instructor, costs $4,000 (i.e., General Chemistry I).
Split into simpler sentences: A Continuing Education course taught during the school year costs $650 per semester. During the summer, the cost for the identical course, taught by the same instructor, costs $4,000 (i.e., General Chemistry I).