Let's answer your question, "How much is Penn Foster College tuition?"
So, the students, are supposed to complete an enrollment agreement every semester. When they send you the enrollment agreement, they mention the tuition fee for that semester, which is fixed. However, it is subject to change alternate semesters which will be informed to the students too.
The reason why the enrollment agreement mentions your tuition fee is because you get to choose the plan that you deem correct for you, and hence, they personalise the price for you too. That being said, you can rest assurfed that most of their courses have low tuition cost like many diplomas cost you lesser than $50 on an average. You can request more information based on the program you are joining, here.
For more information on it, please look at their college catalog.