Need to do website update built on Open cart

Project Description: I need the following changes on my existing newly built opencart website. Person needs to complete all the tasks given below rather than just saying you can do it and after they cannot. I will only pay if its 100% complete not even 99%. -Email newsletter (I already have database just need to put exact same field to insert email address and make it nicer looking so email we are getting on our website will go directly into one central database) -Deal of the day - Need to have deal of the day column on main page to display one product so I can change every day to a new deal. Secondly there should be a countdown timer when deals end.(should also display regular price and sale price) -PO Order: During checkout user can have text field where they can put PO (Purchase Order) number. -Quotes approve Note: when a registered user asks for quote it should appear in their profile so when they log in they should be able to see an order and same time they can approve, edit or cancel the quote. -Need to have proper shipping module with Canada Post and taxes according to shipping province in Canada. I already have Canada Post online account where you can get API or server details. -Need an advance menu so I can sort the products deeply by price range, manufacture, used new etc. I already have menu module which I bought online as per previous bidder for $50.00 it is already installed but need some tweaks. - Should be compatible with all browsers. -Once everything has done need to bring on main domain as per right now it’s on sub domain.