Objective: Create an Expected Close Date (formula) based on the Start Date plus the Number of Total Days that it's expected to take > which is a formula field.  The Number of Total Days is based on 25 or so other fields - adding all the values together.

Issue: I attempted to create a formula field to with the Start Date plus.... (this is the issue) the Number of Total Days Formula field that I created above) is not available to add to another formula.

I also attempted to a number field and have a workflow update the new field with the formula field ( Number of Total Days) - NO LUCK :(

This is easy in Salesforce but I am not sure how to accomplish it in Zoho.

Client has Zoho Professional

Thank you in advance.

Krystal