| Financial statements: 
 Year Ended
 Year Ended March 31,                  March 31,
 ----------------------------------------------     2000
 1996     1997      1998      1999      2000     Pro Forma
 -------  -------  --------  --------  --------  -----------
 (in thousands, except per share data)         (unaudited)
 <S>                       <C>      <C>      <C>       <C>       <C>       <C>
 Consolidated Statements
 of Income Data:
 Net sales...............  $22,021  $31,895  $165,049  $187,381  $393,842   $436,891
 Costs of goods sold.....   18,724   27,347   147,962   172,219   363,974    405,891
 -------  -------  --------  --------  --------   --------
 Gross profit............    3,297    4,548    17,087    15,162    29,868     31,000
 Selling, general and
 administrative
 expenses...............    2,309    2,976     8,328    10,955    21,576     23,878
 Amortization............       --       --        54       190     1,281      1,839
 -------  -------  --------  --------  --------   --------
 Operating income........      988    1,572     8,705     4,017     7,011      5,283
 Other income (expense) -
 net....................      187      247       455      (438)      (74)        28
 Interest expense........     (255)    (315)     (746)     (640)   (3,588)    (4,158)
 -------  -------  --------  --------  --------   --------
 Income before income
 taxes..................      920    1,504     8,414     2,939     3,349      1,153
 Income tax expense......      289      554     3,097     1,273       698       (149)
 -------  -------  --------  --------  --------   --------
 Net income..............  $   631  $   950  $  5,317  $  1,666  $  2,651   $  1,302
 =======  =======  ========  ========  ========   ========
 Net income per share:
 Basic.................  $  0.08  $  0.12  $   0.55  $   0.15  $   0.23   $   0.11
 Diluted...............     0.08     0.12      0.49      0.12      0.15       0.08
 |