Analysis: (1) Look at the sales situation of this store from the statistical chart of broken lines; (2) Add up the sales volume for seven days and divide it by 7 to get the average number of color TV sets sold every day; (3) How many more units are sold on Wednesday than on Tuesday can be solved by subtraction. (1) As can be seen from the statistical chart, the sales volume of this store is high on Saturday and Sunday. Sales are lowest on Monday. (2) (10+15+30+25+20+50+60) ÷ 7, =2 10÷7, =30 (sets). A: On average, 30 color TV sets are sold every day. 30- 15= 15 (unit). A: We sold more 15 units on Wednesday than on Tuesday. Comments: This question mainly focuses on solving related problems according to the information provided by statistical charts, especially the problem of finding the average value.