Fiori like application for Fiori Certifications Cost?

Hi,

Our team is planning to certify an application for fiori certification. I wanted to know about the fees applicable for this, we are following this link TRANSACTIONAL FIORI APP CERTIFICATION. We have already registered for fiori certification,

From this document, I understood that the certification cost would be free, if we completed the app within 90 days from the date of registration. Now I wanted to know, whether is there any hidden cost that has not been mentioned? Moreover, I wanted to know is there any fees for backend ODATA and ABAP RFC?

Thanks,

Sanjo Thomas