Level 2
Liam and Tim share a bunch of chikoos in the ratio 5 : 3. If Liam gives Tim 23 chikoos from his share, they will have the same number of chikoos. How many chikoos does Liam have at first?
Level 3
During her shopping trip, Samantha bought three different types of pens, X, Y and Z in the ratio of 4 : 2 : 5. She decided to sell them at the prices listed as shown.
Pen X: $1.20
Pen Y: $0.85
Pen Z : $0.60
Given that Samantha bought a total 451 pens, how much did Samantha collect from the sale of all the pens?