After the county board of equalization has completed the equalization of the merchants’ and manufacturers’ statements, the clerk of the county commission shall extend on the books all proper taxes at the same rate as assessed for the time on real estate, and he shall, on or before the fifteenth day of October thereafter, make out and deliver to the collector a copy of such books, properly certified, and take the receipt of the collector therefor, which receipt shall specify the aggregate amount of each kind of taxes due thereon, and the clerk shall charge the collector with the amount of the taxes.