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Although specific salary figures for Williams and Wilmer remain undisclosed, they are classified under the federal government's GS (General Schedule) pay scale, specifically between GS-11 to GS-14. Based on these grades, their estimated annual salaries range from approximately $84,000 to $152,000, depending on their respective levels of experience.
In terms of daily allowances, astronauts are provided with an "incidentals" amount while on extended missions. Fellow astronaut Katie Coleman, who participated in ISS missions from 2010 to 2011, noted that this amount can be nominal—around $4 a day for incidentals. If applied similarly to Butch and Sunny's recent mission, they might receive an extra $1,144 on top of their annual salaries due to their time in space.