The following selling rates for foreign currencies based on average exchange rates quoted by the London market in terms of dollars are announced by the Saudi Arabian Monetary Agency (SAMA ) here today. Currency Saudi Riyal US dollar 3.7500 Sterling pound 7.3725 Swiss franc 3.4419 Japanese yen 0.0352 Canadian dollar 3.7677 Euro 5.5519 The agency said the rates of US dollar are SAMA selling prices for banks. 1/8th percent is being added by banks for the first million us dollar and 1/16th percent for sums over one million US dollar.