I created customize formula column in Zoho books

I created customize formula column in Zoho books

I created customize formula column successfully in Zoho books (Item Master).  The customize formula column I want to add into items line total while I create the quotation/ estimate or invoices. I selected show customize formula column in all PDFs, but my formula column not appeared any where.  

When I create estimate / quote , invoices My formula column must be added to line total of items, please help in this its very urgent.