Does the subject want to ask, "How can a little wise family buy a packet of 0.8 French fries, 2.5 cokes and 1.2 cones when they go shopping in the service area?" ? According to the mathematical calculation, Xiao Zhi can buy two things with 4 yuan money, a bottle of coke from 2.5 yuan and a cone from 1.2 yuan, the total is 2.5+ 1.2=3.7, which is not more than 4 yuan.