Sam bought some dragon fruits and kiwis in the ratio of 3 : 8 respectively. The cost of one dragon fruit was $1.20 more than the cost of one kiwi. He spent a total of $73 buying the dragon fruits and kiwis. The total cost of the kiwis was $7 more than the total cost of the dragon fruits. How much did one dragon fruit cost?

	Dragon Fruits	Kiwis	Total
Number of sets	3 sets	8 sets
Compare each	$1.20 more
Total value		$7 more	$73

Total cost of dragon fruits
= (73 - 7) ÷ 2
= 66 ÷ 2
= $33

Total cost of kiwis
= 33 + 7
= $40

3 sets of dragon fruits = $33

1 set of dragon fruits = 33 ÷ 3 =  $11

8 sets of kiwis = $40

1 set of kiwis = 40 ÷ 8 = $5

Difference in cost of 1 set of dragon fruits and 1 set of kiwis
= 11 - 5
= $6

Number of fruits in 1 set
= 6 ÷ 1.20
= 5

Cost of one dragon fruit
= 11 ÷ 5
= $2.20

Answer(s): $2.20