Your style is a little rude I think and won't encourage AB readers to help you. I believe people learn best by trying their own homework, but I'll jot something down to set you thinking. How about this:
I've never heard of term spontaneous assets but I'll assume it's the additional assets needed to support sales volume.
Additional assets needed= 70% of $200,000=$140,000
Impact on liabilities= 30% of 200,000=$60,000
I guess you subtract (do you agree?) and get $80,000 net additional asets
net profit margin= 10% of �500,000= $50,000.
Dividend payout= 40% of $50,000= $20,000
So retained profit= $30,000
New funds needed= 80,000 less $30,000=$50,000.
If you have made any effort to look at lecture/course notes you'll be able to see whether this makes sense and whether I've left in any deliberate mistakes!
Have a go, put your suggested answer and workings on here and someone will be more inclined to help you.