WORK DEVICE: Computer, computer keyboard, adding machine, telephone, fax machine, copier, printer, RF unit, CB radio, handheld radio, bills of lading, files, logbooks, railroad database, scales, calculation sheets, purchase orders, delivery orders, and all inventory reports. This includes walking or standing for extended periods of time, up to 12 hours; climbing stairs; lifting to 50 pounds; carrying to 30 pounds; lowering to 30 pounds from a height of 4 feet; pushing to 250 pounds using carts or other various tools; visual acuity and depth perception; working in various temperatures and humidity levels.