A: Xiaoming wants to buy a box of watercolor pens and a notebook, each for 22.2 yuan.
(2) 13.5-8.7=4.8 (yuan)
A: Notebooks are cheaper than watercolor pens, 4.8 yuan.
(3)38+ 13.5+8.7=60.2 (yuan)
60.2 >50
A: It's not enough to bring 50 yuan.