The county board shall consider the budget document, as submitted to it by the budget-making authority, of the county, and may, in its discretion, revise, alter, increase or decrease the items contained in the budget, but not without first having a hearing with the office or department affected; Provided, however, that when it shall increase the total proposed expenditures of the budget it shall also increase the total anticipated income so that the total means of financing the budget shall at least equal in amount the aggregate proposed expenditures, including the operating reserve.
Neb. Rev. Stat. §§ 23-908