Graphing radical ! me with the question on the picture!

Pls! does anybody know a shortcut for answering these types of questions in the future?

The table shows the webster family’s monthly expenses for the first three months of the year. they are $2,687.44, $2,613.09, and $2,808.64. what is the average monthly expenditure for all expenses?

Divide. write in simplest form 41/6 divided by 10