Your question is Dosage Calculation from Density. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me the steps to calculate the dosage of a Coty product in a given area. The only information you have is the density of this product. Keep in mind the shear rate and spreadability.