AAT Level 2 question help

Hi

I'm really confused on how to get the figures for variable and fixed costs if I'm only given the total cost amount and the number of units.

For example:

NUMBER OF UNITS: 3000 5000 7500 11000
FIXED COSTS:
VARIABLE COSTS:
TOTAL: 41000 105000

I'm confused on this and my exam is tomorrow. I can't wrap my brain around it at all despite seeing the answers. I would appreciate your help

Is there anything else in the question?

Even if you extrapolate the figures, you're only able to find out the average cost per unit and not the VCs or FCs.