7.—(1) For the purpose of regulation 5(a) above, staff costs shall be calculated by reference to the hourly rate at which a person is employed by dividing the reasonably estimated annual cost of employing a person by that person’s productive hours during the same annual period.
(2) In paragraph (1) above, “productive hours” means those hours during which it is reasonably estimated that a person is engaged on a chargeable job or work of a similar kind within the claimant’s organisation, but does not include any periods of sickness, holiday, training or other absence.