Food services at Oxbridge University provides meals to Oxbridge’s conference facility.

It also provides catering to off-campus organizations at an average cost of £30 per person. Off-campus events require additional services to transport staff, food, and equipment to these locations. The cost of these services is £4 per person.

What transfer price should be used between Oxbridge’s conference facility and food services to encourage decentralized decision making that will best benefit the university?