ALLOWANCE FOR DOUBTFUL ACCOUNTS:

6 Months Ended

Sep. 30, 2011

ALLOWANCE FOR DOUBTFUL ACCOUNTS:

ALLOWANCE FOR DOUBTFUL ACCOUNTS:

8.             ALLOWANCE FOR DOUBTFUL ACCOUNTS:

Trade accounts receivable are presented net of allowances for doubtful accounts, returns and credits of $4.6 million at September 30, 2011 and $5.6 million at March 31, 2011.