I am trying to have the system add groups of products. Example is when a user picks one product, say a Laptop for $1000, a 1 year warranty for $250 will automatically be added to his order, as well as a Mouse for $10.00. There will also be a Discount applied of 10% to the Laptop price of -$100. All the user did was add the "Laptop" to the cart and other things are automatically added.
How can this be done?