(1) The suggested budget prepared by the county budget officer as provided in this chapter, together with the estimates and information furnished by the various offices, departments, services, agencies, and institutions of the county, shall be submitted by said county budget officer to the board of county commissioners of his county on or before the first Monday in August of each year; said county commissioners shall convene to consider said proposed budget in detail and make any alterations allowable by law and which they deem advisable and agree upon a tentative amount to be allowed and appropriated for the ensuing fiscal year to each office, department, service, agency, or institution of the county. Such allowances or appropriations shall be made under the classifications of: "Salaries" or "salaries and benefits," and
"Detail of other expenses," or "detail of other expenses and benefits," and may include "benefits," as a separate category as provided in this chapter.