Need help with extra resources

[Herod]

Im trying making a map that use extra resources like sulfur mercury gems.... (HOMM3). I´ve got it in leaderboard, but dont have any idea how to appear the cost of the resource in the unit trainning any tip?

 

[Daffa]

You can only make it appear using custom tooltip by adding information of the cost to the tooltip. Alternatively, if you have 1.31+, consider asking @Tasyen for an UI approach.