The Department of Education, Sport and Culture says it doesn't know how much supply teachers cost over the last five years.
A Freedom of Information request asked for the cost of supply teachers for primary and secondary schools.
The education department said supply teachers were paid between £28.52 an hour and £36.45 an hour,.
But it said it didn't have a total amount spent on supply teachers, and suggested the Cabinet Office might have the figure.
Manx Language Festival to be held next week
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Car falls down steep bank on Mountain Road
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Crash closes section of the Mountain Road