说明：  给公司写的餐费计算程序，直接读入XLS表格进行计算，输出XLS表格。可处理2000人1个月约10万条餐费数据。XLS数据格式参见源代码。
(Meals to the company' s computer program to write directly to calculate the form reads XLS, XLS output table. Can handle 2,000 people a month about 100,000 meals data. XLS data formats see the source code.)