In Colbert County, each election official shall be entitled to receive additional compensation in an amount not to exceed twenty-five dollars ($25) per day, which shall be payable out of the county general fund. Such amount shall be in addition in any amount received pursuant to Section 17-8-12, and shall be paid as a supplement for each election official for each day's service at elections in the county. The amount of the additional compensation shall be determined by resolution of the county commission.