"Revised Edition 4STEP Mathematics 2+B Vectors, Sequences, Published by Kenkyu Shuppan" Price: 860 yen + tax Answer Key Price: 270 yen + tax #Book Used in class. There are some markings. I plan to erase what I can with an eraser before shipping. There are also 5 or 6 places highlighted with a highlighter and a few places with ballpoint pen markings, which will remain as is. Thank you for your understanding. Please consider this. m(_ _)m