I'm new to this & hopefully somebody can help me.  I'm trying to write a formula to trigger an email reminder when an opportunity reaches a certain stage & then has been in that stage for over 60 days.  Have any of you written formulas like this before?

I'm new to this & hopefully somebody can help me.  I'm trying to write a formula to trigger an email reminder when an opportunity reaches a certain stage & then has been in that stage for over 60 days.  Have any of you written formulas like this before?

I'm new to this & hopefully somebody can help me.  I'm trying to write a formula to trigger an email reminder when an opportunity reaches a certain stage & then has been in that stage for over 60 days.  Have any of you written formulas like this before?