Help with net profit ratio calculation??????? (1 Viewer)

[salt_on_chips]

okay so the question is:

current assets $120 000
non current assets $600 000
current liabilities $110 000
non current liabilities $550 000
capital $50 000
Sales $100 000

What is the net profit ratio?
a) 10%
b)60%
c) $10 000
d) $60 000

its obviously not c and d
i think its a) but i'm not sure how to do the caluculations so if someone could help me that would be great.
thanks