Final answer:
The Equal Pay Act of 1963 requires equal pay for equal work regardless of gender, and by extension of other anti-discrimination laws, race, national origin, and age are also protected characteristics that cannot be used to justify wage differences.
Step-by-step explanation:
Under the Equal Pay Act of 1963, Fast IT 4U, LLC, cannot legitimately pay different wages on the basis of race, gender, age, or national origin. The Act mandates that employers provide equal pay for men and women doing the same work in the same establishment. The law specifically targets wage discrimination on the basis of sex but it also supports broader anti-discrimination principles. Although not expressly mentioned in the Act, it is understood in law that differences in pay must be based on legitimate factors such as experience, education, and job performance rather than on race, national origin, or age, which are protected characteristics under other federal laws such as the Civil Rights Act of 1964 and the Age Discrimination in Employment Act.