1. (2023高二上·芜湖开学考) How much should the man pay?

How much are these?<br />Let me see.<br />Two pens are $1.50 and a notebook is $0.80.<br />You need to pay $2.30.<br />Wait a minute.<br />Isn't the price of the notebook $0.60?<br />Oh, I'm sorry.<br />You're right.