Funding or refunding bonds may be issued in a principal amount sufficient to provide funds for the payment of all of the following:
(a)
All bonds to be funded or refunded by them.
(b)
All expenses incident to the calling, retiring, or paying of the outstanding bonds and the issuance of the funding or refunding bonds, including the difference in amount between the par value of the funding or refunding bonds and any amount less than that for which the funding or refunding bonds may be sold.
(c)
Interest upon the funding or refunding bonds from the date of sale to the date of payment of the bonds to be funded or refunded out of the proceeds of the sale or the date upon which the bonds to be funded or refunded will be paid pursuant to the call or agreement with the holders of such bonds.
(d)
Any premium necessary in the calling or retiring of the outstanding bonds and the interest accruing on them to the date of the call or retirement.