Site revision (Bitrix)

Good afternoon, there is a website – sturmanskie.com/

You need to do the following things:
- Add a new filter to the catalog (by availability)
- Doesnt work well enlargement of photos in the product card
- Create a new slider on the title and a new landing under it (there are layouts in the PSD)
- Change the menu in the mobile issue (there is a layout)
- Google Analytics, an ecommerce module
- Add Facebook Pixel to the site
- GET-parameter gives an error

All tasks are described in more detail in the attached file.

We are waiting for offers on prices and terms. Ideally, specify the price for all the work and separately how much an hour costs.

We also ask you to indicate whether it is possible to issue an invoice for a legal entity.

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And there is the second part of the work (I would like to see one specialist do everything).

We want to make (if possible) a custom basket - an approximate design in the file.

But, most importantly, correctly integrate into the existing basket modules PayPal (you need to make sure that a person can immediately pay for a purchase on the site, and not wait until he has a link to pay in the paypal sent). In the office of the paypal everything for developers is.

And the second is the correct miscalculation of the delivery price. We work with DHL, they have some tools/modules. Plus they willingly help.