EXHIBIT 11
BOSTON BIOMEDICA, INC. AND SUBSIDIARIES
STATEMENT RE COMPUTATION OF INCOME PER SHARE
WEIGHTED AVERAGE SHARES
Quarter Ended June 30, Six Months Ended June 30,
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1997 1996 1997 1996
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Average common stock outstanding 4,395,918 2,636,309 4,388,045 2,625,241
Net effect of dilutive common stock
equivalents-based on treasury stock
method using average market price 455,705 623,044 443,702 623,044
Issuance of "cheap stock" - 4,358 - 4,358
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4,851,623 3,263,711 4,831,747 3,252,643
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Net income $175,690 $179,407 $323,448 $82,869
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Net income per share 0.04 0.06 0.07 0.03
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