Pasadena-based CPO Commerce, an e-commerce company focused on tools, equipment, outdoor and yard equipment, and other related products, has been acquired by United Stationers. According to United Stationers, it will pay $30M in cash, with an additional $10M in earnout over three years based on performance. United Stationers said the move would help bolster its e-commerce expertise. CPO Commerce had $78M in fiscal 2013 year sales, according to United Stationers. CPO was founded by Rob Tolleson.