Street dance grading generally requires a certain grading fee. The specific cost varies according to different regions and grades. The following are some general reference data:

The fees for the Grade I examination of street dance usually include the registration fee of 30 yuan, the examination fee of 70 yuan and the certificate fee of 20 yuan, totaling 120 yuan.

The fees for the Grade II street dance examination usually include the registration fee of 30 yuan, the examination fee of 80 yuan and the certificate fee of 20 yuan, totaling 130 yuan.

The fees for the Grade III examination of street dance usually include the registration fee of 30 yuan, the examination fee of 90 yuan and the certificate fee of 20 yuan, totaling 140 yuan.

Please note that these are only reference data, and the actual cost may vary by region and institution. If you have a grading plan, I suggest you directly inquire about the specific cost information from the street dance grading agency in your area. At the same time, we should also pay attention to the selection of formal grading institutions to ensure the fairness and legitimacy of grading.