BARRETT BUSINESS SERVICES, INC.
STATEMENT OF CALCULATION OF BASIC AND DILUTED SHARES OUTSTANDING
Three Months Year
Ended Ended
Dec. 31, 1997 Dec. 31, 1997
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Weighted average number of basic shares outstanding 6,738,826 6,750,523
Stock option plan shares to be issued at prices
ranging from $3.50 to $18.00 per share 559,658 532,615
Warrant issues at a price of $4.20 per share 30,000 47,308
Less: Assumed purchase at average market price
during the period using proceeds received
upon exercise of options and purchase of
stock, and using tax benefits of compensation
due to premature dispositions (516,724) (445,327)
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Weighted average number of diluted shares outstanding 6,811,760 6,885,119
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