I'm getting interviews but no call-backs or offers. Competition for professional jobs among college students is rigorous and complex. You are vying for the same job with not only your university peers but also students from a variety of other colleges. Your paper credentials are working because you are getting screening interviews, but you might not be handling the behavioral interviews to your maximum advantage. Also, consider your body language, facial expressions, physical and mental energy, and professional dress.
Salaries depend on the economy, industry, job title, company size, tradition, and competition.
Your degree, major, minor, concentration, technical skills, language fluency, and work experience can influence the offer. Employers often use the annual salary study of the National Association of Colleges and Employers for guidance. You may find the latest edition at the University Career Center. Negotiate with good will only if you have substantive, factual reasons to support your request. If you have multiple offers, consider the job, the company, the career path, the salary, the current and future benefits, the corporate environment and culture, your new colleagues, senior management, the location, and your lifestyle.