Chad is willing to pay $5.00 to get his first cup of morning latt; he is willing to pay $4.50 for a second cup. He buys his first cup from a vendor...

Chad is willing to pay $5.00 to get his first cup of morning latté; he is willing to pay $4.50 for a second cup. He buys his first cup from a vendor selling latté for $3.75 per cup. He returns to that vendor later in the morning to find that the vendor has increased her price to $3.90 per cup. Chad buys a second cup. Which of the following statements is correct?Choose one answer.