; (II) be established by the Copyright Royalty Judges in an amount that is calculated to defray the reasonable total costs of the mechanical licensing collective, as such total costs are defined in subsection (e)(31); (III) be assessed based on usage of musical works by digital music providers and significant nonblanket licensees in covered activities under both compulsory and nonblanket licenses; (IV) may be in the form of a percentage of royalties payable under this section for usage of musical works in covered activities (regardless of whether a different rate applies under a voluntary license), or any other usage-based metric reasonably calculated to equitably allocate the costs of the mechanical licensing collective across digital music providers and significant nonblanket licensees engaged in covered activities, but shall include as a component a minimum fee for all digital music providers and significant nonblanket licensees; and (V) take into consideration not only anticipated future total costs and collections of the administrative assessment, but also, as applicable— (aa) any portion of past actual total costs of the mechanical licensing collective not funded by previous collections of the administrative assessment or voluntary contributions because such collections or contributions together were insufficient to fund such costs; (bb) any past collections of the administrative assessment and voluntary contributions that exceeded past actual total costs of the mechanical licensing collective, resulting in a surplus