A township supervisor may receive as compensation for services up to one hundred dollars a day for each day necessarily devoted to the work of a supervisor’s office not exceeding four thousand dollars in a calendar year. The electors of the township shall establish the daily compensation rate for township supervisors at each annual township meeting. Additional compensation over four thousand dollars may be provided for reimbursement of expenses as provided in section 44-08-04 and for mileage as provided in section 54-06-09 for each mile [1.61 kilometers] necessarily traveled in the performance of a supervisor’s duties.