Apex Office Print - how to make subgroups in report templates

Question

I am using Apex Office Print 21.1. I have two data sets returned by queries like this:

Main:

store	register	qty
100	ALL	30
200	ALL	120
300	ALL	60

and Details:

store	register	qty
100	1	10
100	2	20
200	1	30
200	2	40
200	3	50
300	1	60

In the docx / excel templates, I would like to have them displayed with groups like that:

main Store 100, register ALL, qty 30 
detail Store 100, register 1, qty 10
detail Store 100, register 2, qty 20

main Store 200, register ALL, qty 120 
detail Store 200, register 1, qty 30
detail Store 200, register 2, qty 40
detail Store 200, register 2, qty 50

main Store 300, register ALL, qty 60 
detail Store 300, register 1, qty 60

How to achieve that with Apex Office Print?

Thank you :)

I tried with breaks, but I stuck on how to display only details connected to specific Main stores. Is there any way to compare break|store from Main with break|store from details?

Here is my code: AOP template with breaks

{#aopireportdata_1|break:"STORE"}{break[0].STORE} {#break}{STORE} {REGISTER} {QTY} {/break}
{#aopireportdata_2|break:"STORE"}{break[0].STORE} {#break}{STORE} {REGISTER} {QTY}{/break} {/aopireportdata_2|break:"STORE"}{/aopireportdata_1|break:"STORE"}

and the result of it: the result of this template