Customers only pay a fraction of a plane's price on order, with the balance coming near its delivery.

客户在下订单时只支付飞机价格的一小部分作为订金，余额在交货前付清。

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For many, this is a revelation: Banks are in business to make money and customers have to pay interest on the balance if they miss the due date.

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The second challenge is the balance between the amount OpenGamma can charge for its subscription and the number of customers that will pay.

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The bank said customers should bring photographic identification and account details (account number and sort code) and a pay-slip if the balance did not reflect any salary payments.

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