How do the marginal and average products of labor affect a firm’s marginal and average variable costs in the short run?

What will be an ideal response?

Over the range of output for which the marginal product is increasing, marginal cost is decreasing and vice versa. At the level of output at which the marginal product is at its maximum, marginal cost will be at its minimum. And, over the range of output for which the average product is increasing, average variable cost is decreasing and vice versa. Finally, the level of output at which the average product is at its maximum is the same level at which average variable cost is at its minimum.