CUSIP No. 810202101 SCHEDULE 13D
CUSIP No. |
000000000 |
SCHEDULE 13D |
Exhibit A
JOINT FILING UNDERTAKING
The undersigned, being duly authorized thereunto, hereby execute this agreement as an exhibit to
this Schedule 13D to evidence the agreement of the below-named parties, in accordance with the
rules promulgated pursuant to the Securities Exchange Act of 1934, to file this Schedule jointly on
behalf of each such party.
Dated: July 31, 2007
Value Fund Advisors, LLC | ||||||
By: | /s/ Xxxxxxx X. Xxxxxxx
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Boston Avenue Capital, LLC | ||||||
By: | /s/ Xxxxxxx X. Xxxxxxx
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Yorktown Avenue Capital, LLC | ||||||
By: | /s/ Xxxxxxx X. Xxxxxxx
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/s/ Xxxxxxx X. Xxxxxxx | ||||||
Xxxxxxx X. Xxxxxxx |