On or before the fifteenth day of February of each year each city officer, department head, board, and commission shall submit to the city manager a proposed budget for the next fiscal year. The city manager shall assemble the budgets so submitted and present them, with his budget proposal, to the council at its second regular meeting in April. Such budget proposal shall include:
(a) Detailed estimates, with his supporting explanations, of all proposed expenditures for each department, office and agency of the city, showing the expenditures for corresponding items for the last preceding fiscal year in full, and for the current fiscal year to January first and estimated expenditures for the balance of the current fiscal year;
(b) Statements of the bonded and other indebtedness of the city showing the debt redemption and interest requirements, the debt authorization and unissued, and the condition of sinking funds, if any;
(c) Detailed estimates of all anticipated revenues of the city from sources other than taxes, with a comparative statement of the amounts received by the city from each of the same or similar sources for the last preceding fiscal year in full, and for the current fiscal year to January first, and estimated revenues for the balance of the current fiscal year;
(d) An estimate of the balance or deficit for the end of the current fiscal year;
(e) An estimate of the amount of money to be raised from current and delinquent taxes and the amount to be raised from bond issues which[,] together with any available unappropriated surplus and any revenues from other sources, will be necessary to meet the proposed expenditures;
(f) Such other supporting information as the council may request.