Changes on Open Cart 1.4.9.4

This is job is about two amendments in Open Cart 1.4.9.4 Front end Amendments Product Price The product page need to show a promocional price without changing the selling value in the back end. Removing a product of cart Removing a product in the cart page isn't intuitive. It will be better if have an icon to remove each product(AJAX based). This job have to be made in 1 day. Necessary Practices - Comment all new lines of code added / changed. - Provide a document describing all the modified files. - should make the change in OpenCart 1.4.9.4. - All changes must be made in fields in PHP code and database.