Provide Amgen with a target range that you would like your salary to fall within given your experience and the position that you are applying for. By providing a range, you are demonstrating flexibility while also voicing what you feel you are worth. The Amgen website mentions a Total Rewards program, "designed to secure the long-term financial, physical, and overall wellbeing of our employee and their families. When compared to other leading biotechnology and pharmaceutical companies, it's clear: Our programs are among the very best." You can also mention that the total benefits package would also impact your desired salary and you'd like to learn more.