Mankato (KMKO)-The American Red Cross office in Mankato needs your help.  Blood donations often decrease during the summer months, so they're offering an added incentive.  As part of their "Live Life, Give Life" promotion, you can be entered into a drawing for a $5,000 gift certificate.  The Red Cross office at 105 Homestead Road in Mankato holds blood drives the second Thursday of every month and the following day.  Call 1-800-Red Cross to set up an appointment to donate blood in Mankato.