The unit cost of the render credits are changes between from $1,00 to $0,50 depending on the purchase amount.
Discounts up to 50% are offered depending on the purchased render credits.
1 Core x 1 GHz x 1 Hour
The processor core unit cost is $0,007. To run out of 1 render credits, 1 GHz processor core needs to run 142,85 hours.