Central Overheads是什么意思

Central Overheads是什么意思
Central Overheads的意思是什么?
上下文是
Tuition Fees $28,000 x 3.5 yrs 98,000
Administration ($300 p.a./student ) 1,050
Central Overheads $9,654/student
per year for 3.5 yrs 33,789
Total Expenses: 132,839
我只想知道Central Overheads的意思