Am I going insane? I'm trying to validate my assigment (Add Business Logic) and I keep getting this error message that the required formula is not there, but it is!! I've done this step 5 times already. Anyone struggle with this as well?

@Berenice Moreno

It's great news! Glad was to help you =) 

I wish you success in your further learning Salesforce.

Sincerely, 

Mykhailo Vdovychenko 

Bringing Cloud Excellence with IBVCLOUD OÜ