Hmmm...let's see if this makes any more sense.
Let's say I want a total of 10 oz of oils. 50% would be 5 oz of olive oil, 20% is 2 oz of coconut oil, 25 % is 2.5 oz of palm oil and 5 % is .5 oz of castor oil...that's a total of 10 oz of oils. Now, I go to soap calc..which is here
http://www.soapcalc.net/calc/soapcalcWP.asp I fill in the blanks... box 1 is either NaOh or KOH, default is NaOh, then I am in the US so I use ounces, so in the 2nd box I check ounces, for a normal batch keep the 38% and 5 % superfatting which are the defaults, those are boxes 3 and 4. Box 5 will change depending on the oils you choose...so the column next to the #5 column has alot of different oils in there. If you double click on olive oil, it will add it to your soap recipe column, add all 4 of the oils in the recipe one at a time. Now, you should have % and oz. in box 7, add 5 for olive, 2 for coconut, 2.5 for palm and .5 for castor. Down at the bottom of that column is a box with 8 in it. Hit the calculate recipe button, it will automatically calculate the amount of oils you put in and give you the amount of liquid and lye for the amount of oils you chose. Then hit view or print recipe and another page will pop up and give you the information you need.
The second set of boxes on the popped up recipe page in purple will tell you how much lye and how much liquid. At the bottom it will give you the hardness, bubbliness, cleansing and conditioning etc of the recipe you just chose. You can save this or print it.
So, approx, how much soap would the 10 oz of oils make? The recipe tells me to use 3.8 oz of liquid and 1.39 oz of lye, if I added lets say .7 oz of fragrance, you are probably talking approx 15- 16 oz of finished product.
Hope this helps.