计算区域选择了简单的长方体。
列和行上都有一些项目，后面的计算区域还有销售统计额。
It has some items on rows and columns, and Sales Amount summarized in the Values area.
对这种复杂非规则边界的计算区域，首次采用分段算法进行计算。
The segment calculation method is first used for this kind of calculation with complex configuration boundary.
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