综合：部门餐费月度汇总报告

solve()

Monthly dept meal report:
  产品部: 191 orders total=1999.5
  人事部: 78 orders total=758.0
  客服部: 301 orders total=2955.5
  市场部: 261 orders total=2749.5
  技术部: 230 orders total=2385.0
  法务部: 114 orders total=1115.5
  行政部: 231 orders total=2346.0
  财务部: 263 orders total=2726.0
  运营部: 268 orders total=2682.0
  销售部: 274 orders total=2852.0
Grand total: 22569.0