Computation of hourly, daily, weekly, and biweekly adjusted rates of pay.

When it is necessary to convert the adjusted annual rate of pay to an hourly, daily, weekly, or biweekly rate, the following methods apply: (a) To derive an hourly rate, divide the adjusted annual rate of pay by 2,087 and round to the nearest cent, counting one-half cent and over as a whole cent; (b) To derive a daily rate, multiply the hourly rate by the number of daily hours of service required; (c) To derive a weekly or biweekly rate, multiply the hourly rate by 40 or 80, as the case may be.