No fee shall be charged for inspection of public records. The society shall charge a fee of ten cents per page for copies of public records and the use of society copy equipment. This charge is the amount necessary to reimburse the society for its actual cost incident to such copying. In the event copies are requested of documents that are oversized or require special handling, the society may increase the per page cost for copying and shall provide a statement of the factors and the manner used to determine the increased cost. If the public records officer deems it more efficient to have the copying done outside of the society, the charges will be based on the actual costs of such outside copying service. For all copying service charges incurred, an invoice will be sent to the requester. Reimbursement is payable within fifteen days of receipt of invoice payable to the Washington state historical society.