CS107 ($70), CS161 ($20), MATH104 ($40), HISTORY106A/B ($100)

Computer Systems: a programmer's perspective) (Bryant & O'Hallaron) - $70
Algorithm Design (Kleinberg & Tardos) - $20
Numerical Algebra (Trefethen & Bau) - $40
Diversity Amid Globalization (6th ed) - $100