We are learning mean, median, and mode. Can you show me what steps to use to reach a correct conclusion?

A geologist collected data on the depth, in feet,of 12 different digs from his colleagues.They shared their data as: 110, 250, 230, 230, 122, 286, 115, 299, 98, 142, 188, 198.

They want us to show what is the mean of this data, and Enter rounded to two decimal places, like this: 42.53.