Integration of WordPress site with 1C

It is necessary to set up the integration of the WordPress site with 1C, customly.
The export of products from 1C to the site is already set up, the handler is written, it is necessary to refine all this.
Tasks:
1) Set up the sending of orders from the site to 1C
2) Send users upon registration from the site to 1C
3) Obtain price types for users and depending on the selected price type in 1C - display the corresponding one for the user on the site.
Please provide the price for these tasks and the deadlines for completion.
We will consider performers only with experience.