; and (II) will correspond to differences in quality (including improved quality) based on the State’s tiered system for recognizing and supporting the quality of child care services described in subparagraph (B). (ii) Cost estimation Such State plan shall— (I) demonstrate that the State has, after consulting with the entities and administrators described in subclause (II), developed and uses a statistically valid and reliable cost estimation model or cost study for the payment rates for direct child care services in the State (that are sufficient to cover providers’ fixed costs and take into account payments made through BASE grants under title II), for the cost of child care at each of the tiers of the State’s tiered system for recognizing and supporting the quality of child care services described in subparagraph (B), and for variations in the cost of direct child care services by geographic area, provider type, and age of child, and the additional costs associated with providing inclusive care; (II) certify that the entities and administrators consulted included the State Advisory Council on Early Childhood Education and Care designated or established in section 642B(b)(1)(A)(i) of the Head Start Act ( 42 U.S.C. 9837b(b)(1)(A)(i) ) (including State Head Start collaboration office directors), administrators of local child care programs and Head Start agencies, organizations representing child care directors, teachers, and other staff, local child care resource and referral organizations, organizations representing parents of children with disabilities and parents of infants and toddlers with disabilities, the State interagency coordinating council established under section 641 of the Individuals with Disabilities Education Act ( 20 U.S.C. 1441 ), the State advisory panel established under section 612(a)(21) of the Individuals with Disabilities Education Act ( 20 U.S.C. 1412(a)(21) ), and other appropriate entities