Prestashop Expert to modify product price display (PRESTASHOP EXPERTS ONLY)

(PRESTASHOP EXPERTS ONLY) Below are the requirements and attached are 2 mockups of what the new price display should show ------------------------------REQUIREMENTS------------------------------ There is a custom field called RRP in the products table [login to view URL] 1. RRP if it has a value should be displayed beside Buy Now price 2. Another value which shows the percentage difference between RRP and Buy Now, here it is shown as “Save 10%”, this percentage should have no decimal points. 3. If “I want to buy now” combination option has zero stock, then it should say “€270,00 Sold Out/On Order” 4. If “I want to buy now” combination option has greater than zero stock, then it should say “€270,00 Buy Now” [login to view URL] 1. RRP if it has a value should be displayed beside prod price 2. If the product has the combination option “I want to pre-order” associated with it, then display the price for that, otherwise display the main price Obviously the above changes should work for all selected currencies