Yes- build your recipe by percentages. Select percentages, and the total amount of all of your oils.
Add the mango butter first, then the rest of the ingredients until you get 100%.
Once you finish the recipe, the amounts to measure are shown:
I always build my recipes by percentages, since that’s how I think about the soap. Usually something like 20% coconut oil, 50% tallow, etc, and you can make any size batch with the same recipe if you think in percentages and not total ounces/grams.