Use the table given to answer questions (a) and (b).
- What was the total number of wafers sold?
- Express your answer in terms of n in the simplest form. If n = 20, how many more wafers were sold on Sunday than on Saturday?
Day | Number of wafers sold |
Monday to Friday | 5n per day |
Saturday | n + 37 |
Sunday | 4n - 5 |