Clients are obviously not happy waiting for the clerks in a row. Lets make them feel better, lets offer them new finance products in a attractive visual form. And they can ask for it as soon as the next clerk is available.
Finance is not easy, so create and publish it in animated, easy to understand form. Add latest finance news about the currency values, stocks etc. in the lower row of the display scrolling ticker.
Is your branch with high volume cliens traffic? Manage it with intelligent queue management system combined with digital signage system.