The Mayor's Office of Management and Budget (OMB) is the City government's chief financial agency. OMB's staff of analysts and experts assemble and oversee the Mayor's expense and capital budgets, which fund the services and activities of approximately 90 City agencies and entities. The Accounting Services, Internal Audit, and Single Audit Task Force comprises the Accounting Services Unit, the Internal Audit Unit, and the Single Audit Unit. The Task Force is responsible for monitoring, interpreting, and applying accounting principles to the City budget, the oversight of the City's Single Audit, as well as performing internal audits of OMB grant programs and administrative functions. The Accounting Services Unit is responsible for monitoring changes to Generally Accepted Accounting Principles and providing advice on its interpretation and application. In conjunction with the City's Comptroller's Office, the Unit staff coordinates the annual audits of the City's financial statements and federal programs which are conducted by an independent CPA firm. The Unit is also involved with the negotiation of grant overhead and fringe benefit reimbursement rates with the Federal government, as well as other cost accounting/cost allocation work and provides accounting and audit related advice to other City and City-related entities as requested.