Production Planning - Paints Assignment

Question:

Do we estimate the amount of each color paint we need or just the
total needed for an element? e.g. My big, scarry head is going to
require 10 different colors of paints in varying amount but will need
50 gallons of paint total - which do you need?

Answer:

I need - how much paint you will have to buy, in which colors, like you were going to the store to buy what you needed.

You could likely assume that for colors that are different but close that you might be able to mix others to get what you need.