Determine whether the mean, median, or mode would be the best choice to describe the center of the following set of data.

A random sample of 20 boxes of cereal are collected. The weight of the box and the cereal is recorded. All boxes of cereal have a weight of 12, 14 or 16 ounces.

Would it be best to use the mean, median, or mode to describe the typical weight of these boxes?