| 摘要 |
Sales management data such as sold product number data, sales data, unsold product number data, unit price data and sales condition data of a vending machine and individual columns are stored. When a given column and given sales management data are selected, the given column is displayed on a column display unit, and the sales management data of the given column is displayed on a data display unit. The sales management data can be set or updated. When a failure occurs in the vending machine, a failure position is displayed on the data display unit.
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