Build an Online Store

This is regarding website [login to view URL] developed in opencart. We have to solve following issues, (kindly share lumsum costing and jobwise costing) Responsive Layouting Single Page checkout Abondon cart Data capture of guest user even if the payment/cod was not successful Google Remarketing Custom tab Google Analytics ecommerce enabling Speed optimization Remove social sharing from all pages Register gate on homepage (with an option of skip) Product in Colored tabs birthdays,Anniversery,etc at Homepage should be seen as slider. And also if the headings such as Birthday,etc are highighted prominantey when hovered. To disallow COD on product under RS.500 How to control/stop cod on flowers and cakes. Create a page/form while ordering cakes/flower for fix day/fix time/mid night. Corporate gifting link is not working on our site. pay pal integration. cod/secure payments/original products/free shipping to be displayed under each banner Tax structure showing in drop down of search box.