I am unable to negotiate a price reduction. Kumon materials, 3A, with missing numbers. Missing numbers are 41, 81-90, 187, and 190. I have checked multiple times, but there may be other missing numbers that I have overlooked. Some pages have dates, check marks, and writing in red pen. There may also be folds and scribbles. These materials were used by a child, so please purchase only if you understand and accept the above conditions. Those considering Kumon may find these helpful. Please note that I cannot answer questions about the target age or how to use the materials. m(_ _)m ②