Hi Jennifer,
The PrepCast reviews the most important formulas that you will need for the exam (Earned Value, TCPI, Communications channels, etc.) but it doesn't review all 49 of them.
The trouble with the formulas is that you never know. I've had students who reported seeing no formulas on the exam and others again said that they were happy they had studied them. Other students again feel comfortable with the formulas in the way they find them explained in other books they purchased. So it's an individual decision and we offer the products separately.
But in a nutshell: he PrepCast will give you the most important formulas but doesn't go into as much detail as the Formula Guide goes.
That's why we offer the Formula Guide to all PrepCast students at a discounted price (the discount is offered to you at the moment you purchase the PrepCast.) In that way you can decide right there and then if you want it.
Of course, if you said "No" during checkout and then you change your mind... no problem. Just write to This email address is being protected from spambots. You need JavaScript enabled to view it. and ask for the info on how to purchase the discounted formulas and they'll help.
Until Next Time,
Cornelius Fichtner, PMP, CSM
President, OSP International LLC