Exhibit A JOINT FILING UNDERTAKINGJoint Filing Undertaking • September 24th, 2007 • Boston Avenue Capital • Services-prepackaged software
Contract Type FiledSeptember 24th, 2007 Company IndustryThe 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.
CUSIP NO. 279445886 SCHEDULE 13DJoint Filing Undertaking • August 14th, 2007 • Boston Avenue Capital • Retail-building materials, hardware, garden supply
Contract Type FiledAugust 14th, 2007 Company IndustryThe 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.
CUSIP NO. 537590101 SCHEDULE 13DJoint Filing Undertaking • August 9th, 2007 • Yorktown Avenue Capital, LLC • Services-miscellaneous amusement & recreation
Contract Type FiledAugust 9th, 2007 Company IndustryThe 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.