1. Create product list grid
2. Add product page
3. Link the product grid cells to the product pages
4. Add any element to the product page or into the product cell
5. Open functions for this element
6. Open Actions
7. Extend payever Checkout functions
8. Select Add Product Function
9. Add another element to any page
10. Open functions for this element
11. Open Actions
12. Extend payever Checkout functions
13. Select Open Cart Function
14. Add another element to any page
15. Open functions for this element
16. Open Data Sources
17. Select payever Checkout functions
18. Select Cart Info Function
19. Add child element into the the element from step 14
20. Open functions for this element
21. Open Context Fields
22.Extend Value functions
23. Select Items Count Function