If, at the output where marginal revenue equals marginal cost, price is between average total cost and average variable cost, a firm will continue to produce in the short run.

Average Variable Cost

The total variable costs (costs that change with production volume) divided by the quantity of output produced.

Average Total Cost

The total cost of production divided by the quantity produced, representing the cost per unit of output.

Short Run

In economics, a period where at least one input, such as plant size or capital, is fixed and cannot be changed, contrasting with the long run where all inputs can vary.