Yandex the currency is not Russian ruble

What I keep forgetting is that the currency in Yandex is not Russian ruble but Yandex units (1 y.u=30 rub).
So to calculate the spends for your Yandex campaign is spends times 30.
Usually there is a certain % of discount. If that is 5% then, it should be

= spends *30* 0.95

[AdWords Basics] PageRank

In Google's organic results, relevancy to the user's query is determined by over 200 factors, one of which is the PageRank for a given page. PageRank is the measure of the importance of a page based on the incoming links from other pages. In simple terms, each link from site A to a page on site B adds to site B's PageRank.

http://infolab.stanford.edu/~backrub/google.html

http://sungmooncho.com/2012/08/26/pagerank/