President Barack Obama’s expected 10-minute speech at Nelson Mandela’s memorial will cost taxpayers at least $500,000 per minute.

That’s not counting any cakes and coffee he and his inner circle consume aboard Air Force One during the 18,000-mile round trip to Johannesburg, via Dakar, in Senegal.

The 28-hour two-way flight will cost $5 million because the four-engined Boeing 747 costs roughly $180,000 an hour to operate, according to a May 2012 report by the Congressional Research Service.