Which is better to choose a bunch of Bitrix + accounting?

Question

Python

I am building a business management system.
We chose 1s-Bitrix as an online store.
Now the question is what to use for accounting.
We need operational, accounting, salaries. What's better? A bunch of synchronizations or SCP?
A bunch of UT + BU + ZUP? Or UPP?
This is for Ukraine.

Answer 1

a = '`Hello`'
Why is this option unsatisfactory?

Answer 2

let's delete this one, and in the new one you will describe the problem and how you solved it - see the picture in my profile