Thanks a lot for that question. I'm sorry I didn't hear it the first time.
In terms of the production cost in general, if we look at the production line from the beginning, we have the oil from the beginning of the production. Throughout that, the oil is actually moving through the refinery, the transportation, the refinery, etc. Each stage is actually adding additional cost.
In terms of contamination in particular, so far we have studied each block of the refinery process and looked into its impact on the contamination of the final product. We came up with a model that found it is actually very possible that overall purity of the product can be enhanced dramatically with proper adjustment or tuning of the refining process.
I'm not sure if that was the question.