 So, the UCR concept is commonly applied in Delta Dental Plan, so it is a one of the reimbursement mechanism. So, let's see what is exactly UCR concept. So, let's take this as an example, Mr. X, Mr. Y and Mr. Z is practicing at location ABC. All are having same qualification that is BDS and they are charging for scaling or order profile axis $100, Mr. Y 150 and Mr. Z $200. Okay, so UCR concept is like the usual fee of these three people will be taken up by the third party and calculate a customary fee which is customer friendly. So, even if you charge $250, $300, there is no point, there will be a customary fee calculation by the third party. So they decide how much you can ask from the patient. So, this UCR concept is the best method of payment because it prevents the exploitation of patients. Some dentist might charge very high and some might get very low payment. So, this ensures a uniform payment mechanism. So this is a usual fee. What is their fee for a particular service but the location and the qualification should be same. If it is MDS, it can be different. So for MDS qualification, the customer fee also will be different. So it will be calculated among the MDS people. This will be calculated among the MDS people at a particular location and mostly this will be calculated by taking percentile. So percentile we have already seen previously. So just an example, the customary fee calculated by the third party is $150 for a oral profile access. So each treatment will have different, different usual fee. So that is customary fee which is customer friendly. So you can see that Mr. Y's usual fee and customary fee is matching. So this and matching for Mr. Y. So Mr. Y's fee is reasonable. When usual and customary fee is matching, that's known as reasonable fee. So that is just a hypothetical scenario. Usually it will be reasonable for every patient and for also dentist working in that particular area. So this is the UCR concept. This should be adopted everywhere because it is both beneficial for the patient, those who cannot afford very much treatment charges and also for dentist because those are paying or asking less money because of their facilities and some might ask very high fee. So all dentist will get a reasonable amount from the patient. So this is UCR concept.