A sound business enterprise must of necessity operate on a balanced budget. To do otherwise means receivership, bankruptcy, or other un desirable action unless necessary funds are forthcoming. The operation of the public schools represents one of the biggest enterprises in any state and as such involves large amounts of money. The regular budget involving expenditures in Pennsylvania is to be carefully prepared. Even though it must not be approved in advance, Act 157 passed at the last session of the Legislature specifically prescribes reviewing the budgets of the various districts as one of the major duties of the county superintendent and the county board of education. Section 2601 of the School Laws of Pennsylvania makes it mandatory to audit all the accounts and to file one copy with the Superintendent of Public Instruction. Section 317 also makes provision for the annual financial report to the Superintendent of Public Instruction. These two reports include only those expenditures from monies derived through taxation. It takes no recognizance of school activities financed by other means.