E. Explain to me again about the wallpaper murals?
    The wall paper murals are a non-repeating pattern tailor made to your dimensions. They usually feature a central image over a patterned background. The central image can be moved to any point on the wall and you won't need to pay for where there are doors and fire places etc.
The paper is priced per linear metre of 47cm wide roll, so for a wall 2.5 metres high it will be the price per metre times 2.5 for a 47cm wide chunk of wall. This figure is then multiplied by the number of 47cm  wide chunks it would take to fill the width of your wall.
Remember you will probably need to exceed both the height and the width to be sure you have enough paper for the wall.