Question: Can you guide me through solving this problem: How much money did you make if you sold 220 chocolate cookies at $1 per cookie and 70 vanilla cookies at $2 per cookie?
Answer: 
You sold 220 chocolate cookies at $1 per cookie earning 220 x 1 = $220
You sold 70 vanilla cookies at $2 per cookie earning 70 x 2 =$140.
In total you earned 220 + 140 = $360