Hello! I've a problem with the developing of an app. My app list many products, so when i press on the product's image, i see a view with the details of the product, where the user can select the quantity. Now: Before the final page (where i send an email to the shopper) i would like to implement a summary page, where i can see the products that i've chosen, with price and quantity. So, how i can "save" that preferences so i can display them in summary view? Thank you!