Question

Ms. Amani and Mr.Blake each ordered supplies for their classrooms. The cost of the supplies is shown below. Ms. Amani ordered 7 pencil cases and 9 packs of folders. Mr. Blake ordered 9 boxes of crayons. What is the difference in the cost of supplies Ms. Amani ordered and the cost of the supplies Mr.Blake ordered?

Answer 1

Ms. A: 7pencil cases*$3= $21, 9folders*$2=$18 = $39
Mr. B: 9crayons*$4= $36

$39-$36= A difference of $3

Answer 2

Ms. Amani:
7 pencil cases
9 packs of folders

Mr. Blake
9 boxes of crayons

Prices:
Pencil case: $3
Box of crayons: $4
Pack of folders: $2

Ms Amani
7 x 3= 21
9 x 2 = 18 
21+18= $39

Mr. Blake
9 x 4= $36

39-36 = $3 difference.