When looking to reinforce or replace naval units, there is no room in the display to show the cost of the units or the balance of funds/conscription/war supplies.
Simply moving the lines to display at the bottom of the box would work and there is room. Something to consider for a patch?
Also, why don't all units in the reinforce/replacement views rollover to show exactly the same unit info as in the game. It would be nice for tooltips/mouse rollovers to work on these units when you're deciding which ones to add.