But, how are the result are counted, the 1000 results you talked about? Through documentation, I understand that you have to do this:

Actor.pushData(datasetItems);

Push the data to dataset array. But I return a very complex data, which can't simply be an array containing objects (like [ {} ] ). Also, which one is the actual cost: Average $0.04 Minimum $0.02 Maximum $0.71 Does the cost changes overtime with the use of the actor? How?