Scarlett wants to buy 17 identical pens as follows.
1 for $4.106 for $23.80 What is the least amount of money she needs to buy 17 such pens?
Maximum number of sets that Scarlett can buy
= 17 ÷ 6
= 2 r 5
Amount to pay for 2 sets of 6 pens
= 2 x 23.80
= $47.60
Amount to pay for the remaining pens not part of a set
= 5 x 4.10
= $20.50
Least amount that Scarlett needed to pay
= 47.60 + 20.50
= $68.10
Answer(s): $68.10