@tax_oz @OXHarryH1 @michaelmina_lab @mbrushstocks The cost is actually very low. For example in schools it is something like $10 per student. It's likewise similar in other venues.
@tax_oz @OXHarryH1 @michaelmina_lab @mbrushstocks 成本其实很低。例如，在学校，每个学生大约 10 美元。在其他场所也是如此。