Formula to assign numeric value to a picklist value and add together

Formula to assign numeric value to a picklist value and add together

I would like to have a formula field where it takes field values equal a numeric value, then add the numeric
If(Len(${Discussion Facilitation.Establishes Instructor Presence}'M''E')'1')+Len(${Discussion Facilitation.Quality of Commentary}'M''E')'1'))

Assistance is apprecaited