There are two kinds of costs in any business. First, there are tangible costs for which a specific invoice is received or which have a definite visible relationship to some management decision, e.g. wages or the butcher's account. Second, there are abstract or intangible costs, which are still incurred, but are not as easily isolated and controlled. I chose to use energy as an example because it is usually a substantial cost in any food business and it is one with a good potential for saving. Start by examining your refrigeration equipment.
Broken seals cause the electric motor to cut in more often and work harder.
Next, find the heat exchanger in the refrigeration unit itself. The heat exchanger is the panel which looks like the radiator in a car and is located with the electric motor at the top or bottom of the unit. Heat exchangers have a fan behind them drawing air for cooling purposes. Again, this is costly. It is a simple matter to regularly clean the heat exchanger with a brush.