Cannot get CRM Formula Fields to Calculate

Cannot get CRM Formula Fields to Calculate

Hello,

I am struggling to get my CRM Formula Fields to perform any task. I've tried to read every support topic, help tutorial and youtube video I could find but cannot get the job done. I somehow fell into success last week and got my formula to return a "decimal" type answer (see screenshots) but when I go to create a new formula field it is not in the drop down menu. I know I am missing some very simple steps. Please help.

I just want to make a simple calculation using number field types all within the same module....

${Campaigns.Goal New Transactions}*${Campaigns.2018 AVG Sales Price}*${Campaigns.Commission Factor}