For example, you could write «automated internal record - keeping processes, resulting in a 27 percent reduction in annual operating costs,» she said. (careerdigital.com)
Use it to compare the energy use of similar models and estimate annual operating costs. (energystar.gov)
Interestingly, annual operating costs dropped 8 % for retail and 4 % for hotels, but increased for restaurants. (cleantechnica.com)