$$(60+10)\div (70-60)=7$$  $$60\times7+60=480$$ 
Several people buy a boardgame together. If each person pays $60$ dollars, $60$ more dollars are needed for the payment. If each person pays $70$ dollars, $10$ dollars are remaining. How much is the boardgame in dollars? 

  * $$600$$ 
  * $$480$$ 
  * $$690$$ 
  * $$550$$ 
  * $$720$$ 