(Richfield, MN)  —  Best Buy is using a 100-thousand-dollar sweepstakes in cash prizes to encourage employees to get vaccinated for COVID-19.  Officials with the Richfield-based electronics retailer say 21 workers will win five thousand dollars each after presenting proof of vaccination to the company.  Employees who are already vaccinated can enter the sweepstakes as well.  The deadline for entry is July 22.