9. Half of the company's employees have a workplace pension. Of this half, 1/3 has contributed to this pension for over 5 years. Employees that have contributed for over 5 years have the option to be paid a lump sum pension payment upon retirement and 20% of eligible employees have elected to receive the optional lump sum. If there are 2,690 employees at this organization, how many employees have elected to take the optional lump sum pension payment?