If you are a student facing financial hardship, speak with your professor. Many have access to publisher grants or department copies. Also, check if your university has a “textbook scholarship” program.

Costos I: Históricos Cristóbal del Río González es una obra fundamental para el estudio de la contabilidad de costos industriales. Cubre desde conceptos básicos y sistemas de costos hasta la práctica contable en entidades industriales. Internet Archive

Better yet, ask your professor for a digital copy. Many teachers have permission to share specific chapters via institutional platforms like Moodle or Google Classroom.