"Gold gained in last 60 seconds" is not very accurate imho, it could be a lot more usefull, since it changes every time you kill a monster and depends on how long you spend killing it. If you kill it in more than 60 sec (for instance), there are times where "gold gained / 60 sec " is 0 !
It should be changed to something like "gold per second" which is a simple quotient between the total gold gained and the total number of seconds passed since the last update you made (I consider an update : a level change, an hero upgrade, a skill use...)
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