recipe question

[SusanC]

I have been using the same recipe for my first few batches of soap, which includes olive oil, palm oil, coconut oil and shea butter. I would like to try adding some sweet almond oil. Here is my question. I've read that I should add an ounce per pound of fats. So if my total amount of fats is 5 pounds, I assume I would add 5 ozs of this oil. Is that right? And then, I would recalculate my water and lye, correct? Or not?

Thanks for the help