Which of the following is/are from a source?

问题描述:

Which of the following is/are from a source?
1.Gross salary
2.Business income calculated under the ITA
3.Taxable capital gain
4.RRSP withdrawals received
5.Allowable business investment loss
6.Payments to an RRSP

下列哪一/哪些来自同一资源?或者:“下列哪一/哪些来源相同”?
1、总薪酬;
2、在ITA(信息技术协议)下计算的营业收入;
3、应税资本利得;
4、注册退休储蓄计划下的退税收益;
5、免税的商业投资损失;
6、支付的注册退休储蓄.
上列各项应该属于会计知识,请参考有关财会资料.