The amount of the "sources of revenue" referred to in subparagraph (a), paragraph (6), Section 13 of New Article X, the amount of the tuition fees referred to in subparagraph (6), paragraph (6), Section 13 of New Article X, and the amount of the general revenues of the State referred to in subparagraph (c), paragraph (6), Section 13 of New Article X shall be established by an appropriate certificate of the State Auditor.