Kimberly spent $102 on some markers, pens and notebooks. The number of markers she bought was ¹₂ the number of pens. The number of notebooks she bought was ¹₅ the number of pens. The ratio of the amount of money she spent on the markers, pens and notebooks was 7 : 5 : 5. The pens were sold at 4 for $6. Find the price of 1 marker.

Amount spent
Markers	Pens	Notebooks	Total
7 u	5 u	5 u	$102

Total amount that Kimberly spent on markers, pens and notebooks
= 7 u + 5 u + 5 u
= 17 u

17 u = 102

1 u = 102 ÷ 17 = 6

Amount that Kimberly spent on pens
= 5 u
= 5 x 6
= $30

Number of sets of pens of 4 bought
= 30 ÷ 6
= 5

Number of pens that Kimberly bought
= 5 x 4
= 20

Number of items bought
Markers	Pens	Notebooks	Total
1x5	2x5
	5x2	1x2
5 p	10 p	2 p	17 p

The number of pens bought is repeated.  Make the number of pens bought is the same.  LCM of 2 and 5 is 10.

Number of pens that Kimberly bought = 10 p

10 p = 20

1 p = 20 ÷ 10 = 2

Number of markers that Kimberly bought
= 5 p
= 5 x 2
= 10

Amount that Kimberly spent on markers
= 7 u
= 7 x 6
= $42

Price of 1 marker
= 42 ÷ 10
= $4.20

Answer(s): $4.20