{
    "ItemX": {"guest":"客人类型","percent":"百分比小费","add":"额外收入"},
    "Items": [
        {"guest":1,"percent":0.01,"add":50},
        {"guest":2,"percent":0.01,"add":40},
        {"guest":3,"percent":0.01,"add":30},
        {"guest":4,"percent":0.01,"add":20}
    ]
}