Samantha has a mobile Burger stand. She wants to employ 3 workers to work for her between September and December. She expects each employee to generate $325 a day each of the 104 working days of this period. However, if she lost 4 days at the start of the period and fully trained her employees, they could generate $375 a day. What is the opportunity cost of not training her employees and recommend her what choice she would make?