A theory of explanation might treat explanations in either a realist or an epistemic (that is, anti-realist) sense. A realist interpretation of explanation holds that the entities or processes an explanation posits actually exist--the explanation is a literal description of external reality.
Officers in pay grades O-1, O-2, and O-3 with more than four years of prior cumulative service in an enlisted or warrant officer grade are paid increased wages using the special pay grades of O-1E, O-2E, and O-3E, respectively.
For example, if the salary range for a particular position is between $45,000 and $75,000, the difference between those two figures would be $30,000. Next, find the difference between the salary offer and the minimum salary. In this example, assuming the offer was $55,000, the difference would be $10,000.