The annual salaries of elected officers of a class B county with an assessed valuation of over three hundred million dollars ($300,000,000) shall not exceed, for:
A. county commissioners, thirty thousand one hundred ninety-six dollars ($30,196) each;
B. treasurer, seventy-five thousand seven hundred thirty-three dollars ($75,733);
C. assessor, seventy-five thousand seven hundred thirty-three dollars ($75,733);
D. sheriff, seventy-eight thousand nine hundred fifty-two dollars ($78,952);
E. county clerk, seventy-five thousand seven hundred thirty-three dollars ($75,733); and
F. probate judge, twenty-six thousand four hundred eighty-two dollars ($26,482).