As you can see, a lot of variables. The building code has changed a lot since the original was built, too-both with regard to strength and to child safety, so that increased cost about 100% over old-railings.
However, Europe and Asia are two different socio-political continents, ie, they are divided like that because the people who lived there have decided it to be that way. So in one way, it is one continent, and in another way, it is two.t's like comparing a banana to a head of lettuce, too different. The landmass of Europe and Asia does have a name, however: Eurasia. However, Eurasia is also joined to the continent of Africa (more specifically, Asia to Africa).
Asia is the largest and most populous continent in the world, sharing borders with Europe and Africa to its West, Oceania to its South, and North America to its East. Its North helps form part of the Arctic alongside North America and Europe. Though most of its continental borders are clearly defined, there are gray areas. Europe and Asia are technically located on the same overall landmass, and combined the two are referred to as Eurasia.