The annual salaries of elected officers of a class B county with an assessed valuation of over seventy-five million dollars ($75,000,000) but under three hundred million dollars ($300,000,000) shall not exceed, for:
A. county commissioners, twenty-one thousand five hundred thirty-four dollars ($21,534) each;
B. treasurer, sixty-four thousand eight hundred forty-four dollars ($64,844);
C. assessor, sixty-four thousand eight hundred forty-four dollars ($64,844);
D. sheriff, sixty-seven thousand eight hundred fourteen dollars ($67,814);
E. county clerk, sixty-four thousand eight hundred forty-four dollars ($64,844); and
F. probate judge, fifteen thousand ninety-eight dollars ($15,098).