It was definitely free when I did part one, most of the Edx courses have a free evaluation and you can access all of the course but not get a certificate. I did

It was definitely free when I did part one, most of the Edx courses have a free evaluation and you can access all of the course but not get a certificate. I did some of this course as well as some Azure certifications. With a discount voucher I think I paid about $60 for the Azure certifications and the courses were run by Microsoft.