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

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Koss Corp (NASDAQ: OSS) Delayed: 9.05 -0.34 (3.62%)
Previous Close $9.39    52 Week High $7.00 
Open $9.14    52 Week Low $7.00 
Day High $9.57    P/E 7.02 
Day Low $9.03    EPS $1.29 
Volume 498,184