The system performs cloud computing based on all your previous inputs, and obtains the project management cost of this set of molds, the profit of this set of molds and the inherent value-added tax. See Figure 1 for details. This is the default minimum value for the system. If the changed value is less than this value, the system cannot let the customer complete the mold order. That means you can't place an order. For example, the profit of this set of molds is 20%, if you enter 19%. The system will not allow you to place an order.