Sec. 3. As soon as the Commissioners Court of such county has determined the total of the assessed value of taxable property according to the value fixed by the Board of Equalization, which values shall be the same as those fixed for State and county taxation purposes, subject thereafter to ordinary corrections, it shall then perform the following duties:
(a) determine the estimated total receipts from the levying and collecting of said Twenty-five (25) Cents tax on the property in the county-wide district according to such valuation;
(b) to determine the estimated amount of money apportionable to each scholastic on the basis of equal per capita distribution according to the then current census of scholastics for the several districts;
(c) to determine the estimated amount of such money available for each common and independent school district according to such per capita distribution;
(d) to cause the ex officio Clerk of such Court to communicate a copy of the order fixing the estimated amount for each independent school district to the president thereof and for each common school district to the County Superintendent or ex officio County Superintendent of such county.