In determining the amount of bonds to be issued, the legislative body may include:
(a) All costs and estimated costs incidental to or connected with the acquisition, construction, improving, or financing of the public works or improvements.
(b) All engineering, inspection, legal, and fiscal agent’s fees, all costs of the bond election and of the issuance of limited obligation bonds, all bond reserve funds, and all bond interest estimated to accrue during the construction period and for a period determined by the legislative body after completion of construction.