Answer: A pair of shoes that costs $20 is sold to the customer for $35, and A shirt that costs $12 is sold to the customer for $20.
Explanation:
1. Half (or 50%) of 20 is 10, so 20+10=30, but 35 is bigger than 30.
2. Half (or 50%) of 12 is 6, so 12+8=18, but 20 is bigger than 18.