Business news in brief: Dell bid Michael Dell has made his "best and final" offer for the computer maker that he founded in 1984 as he tries to win more investor support for his bid to take it private. The group postponed a shareholder meeting for the second time to give its board breathing space to consider the offer, which values the Texas-based firm at more than $24 billion (£15.7bn). The meeting is now scheduled for 2 August. Dell, who has teamed up with investment firm Silver Lake Partners, was previously offering $13.65 a share for the company. The bidders yesterday raised their offer to $13.75. Rescue completed at Optical Express Optical Express yesterday confirmed that founder and chairman David Moulsdale has completed his rescue deal to save the chain from collapse, safeguarding some 1,800 jobs. Moulsdale, who launched the firm as a single shop in Edinburgh in 1991, stepped in to buy the group's outstanding debts from Royal Bank of Scotland to provide working capital and help fund the business. It has 93 stores and 54 consultation centres.