How to display two tables in one crystal report

Question

My invoice can have many Items ( each Item has : Description, Quantity, Unit price and Price...classic ! ) but the invoice can also have many Taxes ( from 0 to 5 taxes, in the example I'm showing, this invoice has 3 taxes : 17%, 4% and 10%, while other invoices can have no Taxes at all )

Here is my GUI (you can see in red the items and in blue the taxes :

Here is the Dataset I'm using :

Here is the Template of the report i want to make :

I googled for result and i found an example LINK => SOLUTION N°2 where they suggest that you create the second table (Taxes) in different report and than Insert it in the first report (Items) as SubReport , my problem is that i need to insert the Total No Taxes => 12 900.00 before i add the Taxes table...! so i didn't know in which Section of the Item's report i need to insert the Taxes Report !

1. I want to know if it is possible to create a such report ?
2. Is the solution I'm following the right way to do it ?
3. If not or if there is a better way to do it please show me ?

Answer 1

首先，您将在报表页脚中添加一个摘要字段，以将“价格”的总和显示为“总税额”，然后在显示“ TaxesDataTable”数据的同一部分（即报表页脚）中添加子报表。

Answer 2

Sub report approach is correct. Follow the process.

Calculate all data in main report then pass the summary to sub report and place the sub report in a section that comes after the data displayed in main report, best would be in report footer. Calculate in sub report and display both