In addition to fees allowable pursuant to § 10-7-506, in counties having a population of more than seven hundred thousand (700,000), according to the 1990 federal census or any subsequent federal census, and in counties having a population of not less than three hundred thirty-five thousand (335,000) nor more than three hundred thirty-six thousand (336,000), according to the 1990 federal census or any subsequent federal census, the clerks of the court as listed in § 8-21-401 may charge a fee not to exceed five dollars ($5.00) for computer searches for any public record having a commercial value.