Evaluate this statement: When a manager is using a technically efficient input combination, the firm is also producing in an economically efficient manner

This statement is actually not true because being technically efficient means that a high amount of output is being achieved, but with a combination of inputs such capital, labor, etc that aren't being utilized at the lowest possible cost. Economically efficient means these inputs are being used at the lowest possible cost, and that the highest amount of output is being achieved from them. Economically efficient is the goal of a business because it means their costs are minimized and profits or outputs are maximized. In other words, technically efficient is not as efficient as economically efficient because technical efficiency does not utilize the resources at the lowest possible cost.