Abstract: According to one embodiment, a dynamic pricing management system has an operation device which calculates and determines product information of each product to be displayed, plurality of electronic shelf labels each includes a display module which allows the product information to be displayed and rewritten, a communication device which allows exchange of the product information between the electronic shelf labels and the operation device, a database in which basic information of each product is stored, a management device which manages sales or inventory information of each product, and an other-than-product data collection device which collects and accumulates fluctuation data other than products with time.

Abstract: A chemical solution is mixed to deionized water from a chemical cartridge 29 via a chemical supply unit 27 to produce a treating liquid. Then, the treating liquid is supplied to a treating tank via a supply pipe. The chemical cartridge 29 is not supplemented with the chemical solution through a supplementing line etc., and the chemical solution is not contaminated. As a result, cleanliness of the chemical solution can be kept high, and substrates can be cleaned at a high clean level. Moreover, the chemical cartridge 29 also has a residual quantity display portion 39. Thus a residual quantity of the chemical solution in the chemical cartridge 29 can easily be recognized, and periodic replacement timing of the chemical cartridge 29 can be recognized easily. Furthermore, the chemical cartridge 29 can control the flow rate by a nozzle portion 47. Consequently, the chemical cartridge 29 can directly be attached to the supply pipe, which can simplify the construction and thus can reduce apparatus cost.