Can't solve a simple but tricky question

Hey guys , am a biologist I need help with an exercise on protein quantification using the Bradford assay ( actually me and my teacher can't agree on it ) After translating the problem, here’s what I’m struggling with:

Context :

We want to measure the concentration of soluble proteins in whey. For this, a volume of 200 µL of the protein solution to be measured is taken, then 800 µL of physiological saline is added. A standard BSA solution (2 mg/mL) is used.

We add 4.9 mL of Bradford reagent to both tubes (sample and standard range), then vortex the tubes, let the reaction mixture rest for 5 minutes at room temperature, and measure the absorbance at 595 nm

The last question of the exercise is to calculate the concentration of proteins in the starting whey, ( knowing that the absorbance of the diluted sample was 0.482 and the corresponding quantity from the calibration curve is 105 µg )

Now the problem is does that mean to calculate the concentration of that first 200ul or find the concentration of the very first solution from where we took the 200ul ? Knowing that 105ug is of the tube that contains 200ul +800ul+4.9ml

Can you help me with the steps and how to get it ?