Tina spent $200 on some markers, pencils and staplers. The number of markers she bought was ¹₅ the number of pencils. The number of staplers she bought was ³₄ the number of pencils. The ratio of the amount of money she spent on the markers, pencils and staplers was 6 : 9 : 5. The pencils were sold at 4 for $9. Find the price of 1 marker.

Amount spent
Markers	Pencils	Staplers	Total
6 u	9 u	5 u	$200

Total amount that Tina spent on markers, pencils and staplers
= 6 u + 9 u + 5 u
= 20 u

20 u = 200

1 u = 200 ÷ 20 = 10

Amount that Tina spent on pencils
= 9 u
= 9 x 10
= $90

Number of sets of pencils of 4 bought
= 90 ÷ 9
= 10

Number of pencils that Tina bought
= 10 x 4
= 40

Number of items bought
Markers	Pencils	Staplers	Total
1x4	5x4
	4x5	3x5
4 p	20 p	15 p	39 p

The number of pencils bought is repeated.  Make the number of pencils bought is the same.  LCM of 5 and 4 is 20.

Number of pencils that Tina bought = 20 p

20 p = 40

1 p = 40 ÷ 20 = 2

Number of markers that Tina bought
= 4 p
= 4 x 2
= 8

Amount that Tina spent on markers
= 6 u
= 6 x 10
= $60

Price of 1 marker
= 60 ÷ 8
= $7.50

Answer(s): $7.50