One Stop Systems (OSS) 8200 contracts of July 30 calls trade

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Koss Corp (NASDAQ: OSS) Delayed: 9.72 -0.25 (2.51%)
Previous Close $9.97    52 Week High $7.00 
Open $9.89    52 Week Low $7.00 
Day High $10.05    P/E 7.53 
Day Low $9.67    EPS $1.29 
Volume 337,059