The example in Listing 9 parses the shopping cart XML file and generates a bill with the individual item totals and the sum total for the purchase ( Listing 10).

清单 9 解析这个购物车 XML 文件并生成一个账单，该账单显示项目合计和采购总计（见 清单 10）。

youdao

Assertion: Use assertions to check relationships between fields — for example, the purchase order's total is the sum of the order lines.

断言：使用断言检查字段之间的关系，比如订单中的总量是各行之和。

youdao

Purchase of large batch or sum requires contract signed with supplier, negotiation of which requires presence of financial personnel.

批量或金额较大的采购，必须与供货方签订购货合同，购货合间有关条款的协商、谈判，都须有财务人员参加。

youdao

On January 31, 2012, IBM purchased announced its intent to purchase Worklight for an undisclosed sum.

FORBES: Worklight Brightens IBM's Mobile Strategy

So a deal was reached, through a shell company, for Apple to purchase that trademark for a trivial sum.

FORBES: As Apple Reminds Us: RTFC

The purchase may be made outright (lump sum) or through a series of deferred (installment) payments.

FORBES: Working With Islamic Finance