This book is called A Kind of Pricing. Despite of the widely used formulas, such as Square Inch multiple Unit Price for 2-dimentional works, pricing art is still difficult and esoteric, even the price of the works by the same artist can vary widely. In terms of the economic principle, price is determined by demand, but it’s still hard to have an accurate prediction of what kind of works is more favorable. For the artists, doing art is like a kind of investment and they have to calculate whether this investment could cover the cost. In Germany, some book artists with great skills and ideas have to live a poor life, and the money they make doesn't cover the materials for creation. Through investigation, I realized that it’s because their pricing strategy is actually based on demand. So, I make a cost-based way of pricing, in order to present how they fall into this situation, and make audience realize the big gap of wealth in art circle.