主题：汇总统计的结果表，数值列如何四舍五入保留小数点后两位？

Dim b As New SQLGroupTableBuilder("统计表2","租赁项目结转明细表")

b.C

Dim dt1 As fxDataSource

b.AddTable("租赁项目结转明细表","合同编号","租赁合同结转情况表","合同编号") '添加统计表

b.Groups.AddDef("{租赁合同结转情况表}.合同编号") '添加客户列用于水平分组

b.Groups.AddDef("客户名称") '添加客户列用于水平分组

b.Totals.AddExp("不含税租金","应结转租金金额-应结转租金税额","截至" & s3 & "_应收不含税租金")

b.Totals.AddExp("应收应缴税额","(应结转租金金额-应结转租金税额)*0.12","截至" & s3 & "_应收计算应缴税")

b.filter=filter

dt1 = b.BuildDataSource()

b3.Totals.AddExp("开piao应缴税额","round(Case When  服务名称='场地租赁' or 服务名称='房屋租金' Then 不含税金额 Else 0 End,2)","截至" & s3 & "_开piao计算应缴税")