Hi there, just taking a stab in the dark here but are you talking about the tiny little numbers (1,2,3,4,etc.) that they show on the website after prices? If you are the terms and conditions which include what each number means, is near to the bottom of the webpage right above where it says (SHOP, SUPPORT, ABOUT US, CONTACT US) reads (Show legal terms and conditions). That is where you should find the information your looking for. You might need a magnifying glass though to read it, lol. Hope I helped, if this was not what you were asking about maybe provide a little more info.
@g-idk -- You might need a magnifying glass
In Microsoft Windows, some web-browsers have a built-in "magnification" feature -- hold-down the CTRL key (bottom-left corner of your keyboard) and touch the "plus" key a few times, to magnify the text on the screen. Then, release the CTRL key. You might have to "scroll" the window, to move to the bottom. Hold-down the CTRL key, and touch the "zero" key, to cancel the magnification.